This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less tha
full bulletin at NHTSA ↗2011 GMC Sierra powertrain problems
moderate 25 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
25
Recalls
0
Avg fix
$2,500
1crash
When does it fail?
Of the 25 powertrain complaints filed for the 2011 GMC Sierra, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 25 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA powertrain complaint has been filed on this vehicle in over 15 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician of an engine power reduced message on the driver information center after performing the Canada Onstar® 4G upgrade. If the concern is present park the vehicle outside and call General Motors Technical Assistance Center.
full bulletin at NHTSA ↗This preliminary informational bulletin provides a diagnostic tip that may be helpful in correcting a customer concern on a vibration, shudder or roughness while driving at low speeds with a steady throttle on a level road.
full bulletin at NHTSA ↗GM: SOME VEHICLES MAY DISPLAY ON THE DRIVER INFORMATION CENTER (DIC) "TRANSMISSION HOT- IDLE ENGINE". DTC U0101 MAY BE SET. MIL MAY BE ILLUMINATED.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about vehicles that will not move in forward or reverse. Technician may find Diagnostic Trouble Code P0701 P0729 P0731 P0732 P0733 P0734 P0735 P0751 P0756 P0761 P0877 Or P2723 set. Technician will need to inspect the valve body separator plate orifices for debris.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2011 Sierra's powertrain is a catalogue of recurring failures. Check engine lights ignite repeatedly tied to EGR temperature sensor codes (P113A, P2471, P20CC) and loss-of-power events; dealers clear codes only to have them return minutes later. Valve lifter failure causes misfire, engine knock, and power loss—GM's own service bulletin acknowledges this known defect with notes on camshaft scoring, yet no recall exists. Transmission hesitation lasting 1–2 seconds when accelerating from a stop or low speed, leaving owners stranded in traffic intersections, occurs repeatedly across the complaint set.
Stabilitrak and reduced-engine-power warnings precede complete engine shutdown even after dealer throttle-body-sensor replacement; owners report steering lockup and no acceleration response. Rear axles exhibit excessive play and clunking noise from machining defects on the C-clip retainer grooves; one owner's axle was replaced after GM Tech Assistance confirmed the fault. Sudden downshifts without warning—from 5th to 3rd or 1st gear at highway speeds—cause abrupt deceleration; one owner had their transmission replaced three times with rear-wheel lock-up recurring each time. Additional complaints include shift cable separation, cold-weather shifter sticking, vehicle lurches while parked or driving, and one catastrophic rear-differential failure.
Same GMC Sierra powertrain reports on nearby years: 2014
Failure modes owners describe
EGR and exhaust sensor faults with loss of power
Engine light repeatedly illuminates with sensor overheating issues. Owners report loss of power messages alongside low exhaust fluid warnings. Diagnostic codes point to EGR temperature sensor and correlation faults triggering limp mode.
When: Early in ownership; codes recur within minutes of clearing
Symptoms owners cite: check engine light repeatedly; loss of power while driving; low exhaust fluid warnings; vehicle enters limp mode
Codes mentioned: P113A, P2471, P20CC
Repairs/costs cited: Dealers unable to address within reasonable timeframe; codes clear but return immediately
Valve lifter failure with misfire and engine knock
Owners report cylinder misfire codes, tapping/knocking engine noise, and power loss. A GM service bulletin documents valve lifter failure as a known issue, noting lifter springs can fail and score camshaft. Problem occurs on cylinder shutdown during cruising. Covered under powertrain warranty when in-warranty but not after expiration.
When: Various mileages; one owner with under 40k miles, another after 2 years
Symptoms owners cite: check engine light; tapping or knocking from engine; loss of power; misfire codes
Codes mentioned: P0306
Repairs/costs cited: Service bulletin exists for lifter failure; repair involves valve lifter replacement and camshaft inspection for scoring
Recalls/TSBs owners mention: Service bulletin available for dealers; not issued as recall; covered by powertrain warranty only while in-warranty
Transmission hesitation and lag on acceleration
Vehicle hesitates or lags for 1–2 seconds when accelerating from a stop or low speed. Transmission feels unresponsive, as if going into neutral during braking then struggling to engage. Owners report it feels dangerous in intersections. Dealers say vehicle operates as designed; reproduction at will reported.
When: Early ownership (1,500 miles reported); intermittent throughout ownership
Symptoms owners cite: hesitation on acceleration; 1–2 second lag when pedal applied; transmission feels disconnected; vehicle unresponsive in traffic
Repairs/costs cited: Dealer states vehicle operates as designed; no repair performed
Stabilitrak and reduced engine power with engine shutdown
Stability control and reduced power warnings precede complete loss of engine responsiveness and acceleration. Steering wheel locks. Repeated dealer visits result in throttle body sensor replacement but problem recurs. Owners report near-misses when vehicle stops responding while driving.
When: Multiple occurrences over ownership period; one case on highway, another at 30 mph over hill
Symptoms owners cite: stabilitrak off warning; reduced engine power warning; engine stops responding; no acceleration available; steering wheel locks; vehicle slows with no power
Repairs/costs cited: Dealers replace throttle body sensor; one towing cost of $430 reported
Rear axle excessive play and clunking noise
Owners report clunking or rattling noise from rear when driving or backing over grades, or simply when shaking the truck bed side to side. Excessive play in rear axles identified; grooves on differential or axle shafts that hold C-clip retainers are machined too close to shaft end, allowing loose fit. Factory rep told one owner play is within tolerances; dealer greasing leaf springs did not resolve it. One owner had axle replaced after GM Tech found the machining fault.
When: Early ownership; noted with less than 2,000 miles and brand new condition
Symptoms owners cite: clunking noise from rear; rattling noise from bed area; excessive axle play when shaken; noise when backing on grade with wheels turned
Repairs/costs cited: One owner had axle replaced; another told greasing leaf springs fixed it but problem persisted; one dealer called GM Tech Assistance and confirmed machining fault requiring axle replacement
Transmission sudden downshift and unexpected acceleration
Transmission suddenly downshifts without driver input, causing abrupt engine acceleration and vehicle deceleration. One owner reports downshift from 5th to 3rd gear and engine jumping to 4000 RPM while descending a hill in tow mode. Another reports sudden downshift to first gear at 45 mph. Check engine light may illuminate after event.
When: Under 2,000 miles (tow mode event); at 45 mph on highway; at various mileages
Symptoms owners cite: sudden unwanted downshift; engine over-revs without driver input; abrupt vehicle deceleration; check engine light after event
Repairs/costs cited: TCM (transmission control module) replacement identified as fix
Transmission failure with rear wheel lock-up
Transmission fails completely, causing rear wheels to lock up. One owner reports transmission was replaced three times, with rear wheels locking up after each replacement. Vehicle spun sideways on highway and was struck by four other vehicles.
When: During highway driving
Symptoms owners cite: rear wheels lock up; transmission failure; vehicle spins out of control
Repairs/costs cited: Transmission replaced three times; same failure mode recurred each time
Vehicle lurches or lunges forward unexpectedly
Vehicle lunges forward abnormally while parked in park and powered on, or while driving at low speed. Owner had to depress brakes while parked to prevent vehicle from traveling. Another owner reports lunge while driving 43 mph with abnormal noise; dealer said noise is normal for powertrain type.
When: While parked at 90k miles; while driving at 400 miles and again at 11,728 miles
Symptoms owners cite: unexpected forward lunge; abnormal noise during lunge; intermittent occurrence
Repairs/costs cited: Dealer unable to diagnose cause
Vehicle rolls away in reverse while parked
Vehicle rolls away in reverse down a residential driveway without driver input while parked. Dealer unable to diagnose cause.
When: At 28,000 miles
Symptoms owners cite: vehicle rolls away in reverse while parked
Recalls/TSBs owners mention: Manufacturer notified but did not provide assistance
Transmission dipstick tube fracture and recall fix inadequacy
GM issued recall for fractured transmission dipstick tube. Factory repair consisted of wrapping foam and plastic around tube. Tube fractured again and needs replacement. Repair leaves transmission open to water and dirt.
When: Post-recall service
Symptoms owners cite: fractured dipstick tube; transmission exposed to elements
Repairs/costs cited: Recall repair using foam and plastic wrapping; tube fractured again requiring replacement
Recalls/TSBs owners mention: Recall issued for fractured dipstick tube; factory repair inadequate
Shift cable separation
Shift cable separated from shift lever, preventing ability to shift vehicle into park. Retaining clip deteriorated and allowed separation. Owner temporarily refastened using zip-tie.
When: 2022 (over 11 years of ownership)
Symptoms owners cite: unable to shift into park; shift cable separated from lever
Repairs/costs cited: Retaining clip deteriorated; owner used zip-tie temporarily until new clip sourced from parts store
Rear differential failure
Rear end exploded while driving on main route at posted speed limit. Owner had to use 4x4 to get vehicle off road.
When: During routine driving
Symptoms owners cite: rear end/differential failure; complete loss of rear drivetrain function
Cold weather shifter sticking
In very cold weather, shifter becomes stuck and will not move to any gear position.
When: Cold weather conditions
Symptoms owners cite: shifter stuck in place; unable to shift gears
Transmission control module issue with cold weather lifter
Check engine light comes on when temperature drops below 40 degrees and goes off when temperature rises above 40 degrees. Owner spent $2,000 on parts chasing the problem and identified two lifters that do not like cold weather.
When: Cold weather; early ownership
Symptoms owners cite: check engine light in cold weather; lifter noise/failure in cold
Repairs/costs cited: Owner spent $2,000 on parts trying to resolve; identified as lifter issue
Transmission jerking and downshift with warning lights
Vehicle jerks and shudders while downshifting. Stability Trac and traction control warning lights illuminate. Throttle body sensor identified as needing replacement.
When: At 103,000 miles; warranty good until 120,291 miles
Symptoms owners cite: jerking and shuddering on downshift; stability trac warning; traction control warning
Repairs/costs cited: Throttle body sensor replacement needed
Starting issues and rattling noise
Starter or flywheel problem causes hard starting. Rattling noise occurs while driving at approximately 1500 RPM. Knocking noise from rear of truck. Vehicle under 40,000 miles.
When: Under 40,000 miles
Symptoms owners cite: hard starting; rattling noise at 1500 RPM; knocking from rear
Repairs/costs cited: Still under warranty
Transmission hesitation and erratic shifting
Vehicle hesitates on acceleration and engine lags for a split second before engaging. When engine engages, drivetrain bangs. Vehicle will not hold steady high-gear speed; transmission continuously shifts between 5th and 6th gear, and vehicle loses speed in 6th.
When: Early ownership, 1,500 miles; updated at 5,000 miles
Symptoms owners cite: hesitation on acceleration; engine lag on engagement; drivetrain bang on acceleration; erratic shifting between 5th and 6th; vehicle loses speed in high gear
Repairs/costs cited: Dealer advised no failures found; vehicle operating as designed
Transmission jerking with brake release and acceleration
When coming to complete stop, releasing brake, and applying accelerator, vehicle makes loud clunk/plunk sound and jerks. Noise and feeling comes from rear axle. Issue present from day one of ownership. Multiple dealer visits have not resolved it.
When: From day one of ownership; multiple visits over time
Symptoms owners cite: loud clunk/plunk sound on acceleration from stop; jerking sensation; noise from rear axle area
Repairs/costs cited: Dealer has not stopped the problem; says nothing can be done without manufacturer bulletin
Differential noise with dashboard airbag cracking
Cracking noise from differential; unrelated dashboard airbag issue also noted (plastic cracking on airbag cover).
Symptoms owners cite: differential cracking noise; dashboard airbag plastic cracking
Synthesized from 25 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Tl* the contact owns 2011 GMC sierra 1500. The contact was driving 50 MPH when the vehicle hesitated and was slow to accelerate. The vehicle was taken to the dealer and they advised that there were no failures and the vehicle was operating as designed. The vehicle was not repaired. The failure and current mileage was 1,500 updated 02/23/11 *bf the consumer stated the vehicle would hesitate on…
11/2022 shift cable separated from shift lever; preventing ability to put vehicle Into park. Retaining clip deteriorated allowing separation. Fortunately it happened when leaving parking garage and not moving fast. Was able to refasten using zip-tie until new retaining clip arrived at auto parts store.
Had powertrain trouble with your 2011 GMC Sierra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2011 GMC Sierra?
It's a documented issue but not catastrophic. 25 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 19 complaints that reported odometer mileage, most powertrain failures cluster between 19,634 and 90,000 miles, with the median around 39,500. A quarter of owners report trouble before 19,634; a quarter make it past 90,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2011/GMC/Sierra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.