This Preliminary Information communication provides steps the technician will uses to diagnose and repair vehicles that have low oil pressure after an oil change with the engine Regular Production Option Code L20, L77, L94, L96, L99, L9H, LC8, LC9, LH9, LMF, LMG, LY6, or LZ1. Vehicle may have Service Engine Soon lamp with Diagnostic Trouble Code P0521 or Low Oil Pressure message on the instrument panel. Dealer will need to determine if bulletin 10-06-01-008 was completed. If the bulletin was performed inspect the left rocker cover. Dealer will insure the left rocker can hold water without leaking. If leaks are found apply room temperature vulcanization silicone to the rocker cover if possibl
full bulletin at NHTSA ↗2007 GMC Sierra engine problems
moderate Owners of the 2007 GMC Sierra have filed 25 NHTSA complaints about the engine, typically surfacing around 74,925 miles at roughly $3,100 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Failure mileage
Complaints
25
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2005 Sierra | 44 |
| 2006 Sierra | 9 |
| 2007 Sierra (this page) | 25 |
| 2008 Sierra | 14 |
| 2009 Sierra | 13 |
| 2010 Sierra | 14 |
| 2011 Sierra | 11 |
1fire
When does it fail?
Of the 25 engine complaints filed for the 2007 GMC Sierra, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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 engine 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 engine complaint has been filed on this vehicle in over 14 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 engine 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 informational bulletin provides information on close coupled converters and there affect on newly installed engines or engines during there break in period.
full bulletin at NHTSA ↗This informational bulletin provides information to technicians regarding intake manifold inspection/replacement after severe internal engine damage.
full bulletin at NHTSA ↗CADILLAC/CHEVROLET/GMC: ON SOME VEHICLES AND/OR TRUCKS, INSTRUMENT CLUSTER WILL ILLUMINATE, AFTER AN OIL CHANGE, INDICATING LOW OIL PRESSURE AND/OR SES LAMP WILL ILLUMINATE. MODEL 2007-13 CANYON, SIERRA, SAVANA, YUKON, CTS-V, ESCALADE, AVALANCHE, CAMARO SS, COLORADO, CORVETTE, EXPRESS, SILVERADO, SUBURBAN, TAHOE.
full bulletin at NHTSA ↗This technical bulletin provides repair information for repairing the IP to body harness connector to correct a customer concern for intermittent Malfunction Indicator Lamp (MIL) illuminated with Reduced Engine Power displayed and DTC P2138 set.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Excessive oil consumption is the most frequent complaint. Owners burn 1 quart every 800–3000 miles depending on driving conditions, with highway use causing heavier burn rates. Dealers initially told owners it was normal for the 5.3L, though GM later wrote that 1 quart per 2000 miles is the design specification. Several owners performed oil consumption tests; at least one had an engine replaced at 87,000 miles after burning 1 quart per 1000 miles.
Engine power loss happens suddenly at highway speeds—the vehicle decelerates from 65–70 mph to 30 mph or stalls completely, forcing drivers to coast to the shoulder. Check engine lights appear. The vehicle sometimes restarts and runs normally, then fails again within miles. One owner had a computer motherboard replaced, but the problem returned a month later.
Cylinder and structural failures also appear. One truck lost two cylinders and power at highway speed around 57,000 miles. Another suffered a cracked cylinder head at 180,000 miles. A third engine seized its main bearing at 87,000 miles, causing the starter to burn. Cold-start tapping (suggesting stuck lifters or poor oil delivery to valve train) persists until the engine warms, despite correct oil level and grade. Plastic fuel lines have failed on at least one truck, spraying fuel near the exhaust—a fire hazard. One fire occurred in the engine compartment; origin was unknown.
Same GMC Sierra engine reports on nearby years: 2005 · 2008 · 2009 · 2010
Failure modes owners describe
Excessive oil consumption
Engine burns oil at abnormal rates, typically 1 quart per 800–3000 miles depending on driving conditions. Owners report constant top-ups between oil changes. Dealers initially dismissed it as normal for the 5.3L engine, though GM later acknowledged designed consumption of 1 quart per 2000 miles.
When: Throughout vehicle life, can occur within first 50,000 miles or persist to 160,000+ miles
Symptoms owners cite: Oil level drops between scheduled oil changes; More pronounced with highway driving; Owner reports quart every 800–1200 miles on AFM-equipped engines; Burning smell in some cases
Repairs/costs cited: Dealers performed oil consumption tests. Some owners report GM ordered parts; one narrative mentions piston and ring replacement attempted. One engine with 87,000 miles suffering 1 qt per 1000 miles required full replacement.
Recalls/TSBs owners mention: GM issued TSB or service procedures including oil consumption testing; one owner received letter stating 1 qt per 2000 miles is design spec. Oil shield fix mentioned by dealer as potential remedy.
Loss of engine power / limp mode
Engine power reduced or cut out suddenly while driving at highway speeds, causing vehicle to decelerate dramatically or stall. Check engine light and other dashboard warning lights illuminate. Vehicle sometimes restarts and runs normally, then fails again within a few miles.
When: Occurs at 57,000 miles; 124,000 miles; 80,000+ miles; 135,000–160,000 miles
Symptoms owners cite: Engine power reduced warning indicator; Sudden deceleration from 65–70 mph to 30 mph; Multiple recurrences over short distances; Vehicle must coast to shoulder and shut off to recover; Check engine light and dashboard warning lights appear; Loss of acceleration despite throttle input; Engine running sluggish with reduced passing speed
Codes mentioned: Engine power reduced (warning indicator present)
Repairs/costs cited: One owner had independent mechanic replace computer motherboard; failure recurred one month later. No repairs completed in most narratives.
Recalls/TSBs owners mention: Manufacturer not notified in some cases; when contacted, did not assist. GM aware of issue according to at least one owner but refused voluntary repairs.
Cylinder/piston/ring failure
Engine cylinders fail or lose compression, causing loss of power and eventual breakdown. Cracked cylinder heads reported in one case, allowing coolant leakage into combustion chamber. Rocker arm defects cited in another.
When: 57,000 miles (two cylinders dropped); 87,000 miles (main bearing thrown); around 180,000 miles (cracked cylinder heads)
Symptoms owners cite: Loss of most power to vehicle while on interstate; Engine stalling or shutoff without warning; Tapping noise on cold start (lifter/oil delivery issue); Bad rocker arms causing loss of power and breakdown; Loud noise and inability to accelerate while towing
Repairs/costs cited: Cylinder replacement or full engine replacement required in most cases. One owner faced cost decision to replace 2 cylinders or whole engine. One engine replaced at 87,000 miles after main bearing seizure.
Recalls/TSBs owners mention: No recall issued for many affected vehicles. One owner mentions recall 14121 was limited to newer vehicles despite recurrent problem since before 2000.
Cold-start engine noise (tapping/valve train)
Tapping noise from top of engine on morning starts, suggesting stuck lifters or inadequate oil supply to valve train. Noise persists 10–15 minutes until engine warms, then disappears. Occurs despite proper oil level and correct oil grade.
When: Recurring on cold starts; vehicle deployed in Afghanistan and driven regularly by owner's wife
Symptoms owners cite: Loud tapping noise resembling stuck lifters; Noise continues 10–15 minutes after start-up; Disappears once engine reaches operating temperature; Noise present every cold start
Repairs/costs cited: No repair completed. Owner (30+ year mechanic) confirmed proper crankcase oil level and use of recommended 5W30 oil.
Fuel line leaks/failures
Plastic fuel lines fail and leak gasoline, creating fire hazard. Fuel found dripping or sprayed near exhaust pipe area.
When: Occurred three times in two years on vehicle with 35,000 miles
Symptoms owners cite: Fuel odor detected; Gasoline dripping near exhaust pipe; Fuel sprayed in exhaust area (fire risk)
Repairs/costs cited: Multiple fuel line replacements performed at shop/dealer
Engine fire/overheating
Engine compartment fire and smoke reported in two narratives. One involved starter burning after main bearing seizure; origin of other fire unknown. Cooling system leaks causing overheating also reported.
When: Occurs at 85,000 miles (fire); 87,000 miles (starter fire); 83,000 miles (cooling leak)
Symptoms owners cite: Smoke and burning smell from engine cover; Vehicle caught fire on shoulder; Cooling fluid leakage; Engine overheating (recurring)
Repairs/costs cited: One case: main bearing seizure and starter burnout requiring full engine replacement. Cooling leaks not diagnosed or repaired.
Cracked cylinder head
Cylinder head develops crack, allowing coolant to leak into combustion chamber. Vehicle shuts off without warning while driving.
When: Approximately 180,000 miles
Symptoms owners cite: Vehicle shut off without warning while driving 65 mph; Coolant leaking into engine
Repairs/costs cited: Diagnosed by independent mechanic; vehicle not repaired
Synthesized from 25 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
I own a 2007 GMC sierra 1500 crew cab. I have some issues when I start my truck in the mornings, I get a tapping noise as if there are lifters stuck or not getting sufficient oil. I have always used the recommended ac oil filters that I purchase from the local dealership parts center so I know that the filter is not the problem. I am a mechanic so I know what an engine is supposed to sound like.…
Had engine trouble with your 2007 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 engine problem on the 2007 GMC Sierra?
It's a documented issue but not catastrophic. 25 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 21 complaints that reported odometer mileage, most engine failures cluster between 36,000 and 87,000 miles, with the median around 74,925. A quarter of owners report trouble before 36,000; a quarter make it past 87,000. 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2007/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.