This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
full bulletin at NHTSA ↗2007 Chevrolet Suburban powertrain problems
moderate 22 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
22
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 22 powertrain complaints filed for the 2007 Chevrolet Suburban, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 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
No new NHTSA powertrain complaint has been filed on this vehicle in over 13 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.
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
full bulletin at NHTSA ↗This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
full bulletin at NHTSA ↗This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
full bulletin at NHTSA ↗This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report transmission failures beginning as early as 4,000 miles and escalating through the vehicle's life. The most common complaint is slippage or delayed engagement, where the transmission won't respond for 10–15 seconds when accelerating from a stop, then engages hard and jerks through gears. Several owners describe the transmission disengaging entirely while driving at highway speeds, causing loss of power and forcing them to limp along in lower gears or coast to a stop.
A critical recurring issue involves forward sprag failure—the sprag component breaks internally, causing sudden loss of Drive engagement while the vehicle is moving. One transmission shop encountered identical sprag failures on consecutive 2007 Suburbans, suggesting a pattern. Owners note GM updated the sprag in later model years but has not recalled the defective units already in service.
Post-fluid-flush failures appear in multiple narratives; the transmission works initially after service, then fails within a year with identical symptoms. Some vehicles lose the ability to shift into Drive altogether, revving the engine while the vehicle won't move. Torque converter slippage causes rollback on inclines and rough idle at stops. By 50,000–80,000 miles, many owners face either full transmission replacement or rebuild, with repair costs ranging $2,300–$3,500. GM's partial-coverage responses ($120 diagnostics, 30–45% repair reimbursement) leave owners paying thousands out of pocket after powertrain warranty expires.
Same Chevrolet Suburban powertrain reports on nearby years: 2005
Failure modes owners describe
Transmission slippage and delayed engagement
Transmission fails to engage when accelerating from a stop, taking 10-15 seconds before vehicle moves. Engine revs but vehicle moves slowly. Occurs sporadically starting between 50,000-58,000 miles.
When: 50,000 to 58,000 miles initial onset; escalates by 63,000 miles
Symptoms owners cite: No engagement when pressing accelerator at stop; Engine revving without vehicle movement for 10-15 seconds; Hard shifting in higher gears; Transmission overheating warning message at 63,000 miles
Repairs/costs cited: New transmission required at 63,000 miles; cost $3,350 out of warranty. Inner transmission mechanism failure.
Recalls/TSBs owners mention: GM paid 30% of repair ($1,005) and 5 days rental after customer complaint; powertrain warranty had expired 6 months prior
Forward sprag unit failure
Forward sprag component breaks internally, causing vehicle to lose drive engagement while moving and requiring full transmission rebuild or replacement.
When: Mileage varies; one case noted around 100,000+ miles based on narrative context
Symptoms owners cite: Vehicle drops out of drive while driving; Loss of power to wheels; Unable to place vehicle in Drive or 3rd gear; Can only operate in 1st and 2nd gears initially
Repairs/costs cited: Full transmission rebuild or replacement required. Narrative indicates transmission shop encountered identical sprag failure on another 2007 Suburban immediately following same repair.
Recalls/TSBs owners mention: No recall issued. Narrative states GM updated input sprag on later model years to be stronger but refuses to recall weak units in earlier vehicles already in service.
Transmission failure post-flush; plates and internals failing
Vehicle loses drive capability shortly after transmission fluid flush service. Repairs include internal parts replacement, but same failure pattern recurs within a year.
When: Shortly after first flush; recurred at 65,414 miles after second flush approximately one year later
Symptoms owners cite: No forward movement after reverse engagement; Hesitation and engine revving while losing speed at 65 mph; Not shifting past first gear; Vehicle stuck in neutral despite being in Drive position
Repairs/costs cited: First repair: three plates, valve, filter kit, gasket kit replaced. Second failure at 65,414 miles required transmission shop diagnosis; dealer refused service claiming out of warranty.
Recalls/TSBs owners mention: Dealer refused warranty coverage on second failure. Narrative notes owner found numerous online complaints about same defect pattern.
Intermittent Drive disengagement at speed
Transmission disengages randomly while vehicle is being driven at highway or moderate speeds, causing engine to rev and vehicle to lose power. Occurs primarily in Drive gear.
When: Occurs intermittently at various speeds; at least three separate incidents reported
Symptoms owners cite: Transmission disengages while in Drive; Engine revving while vehicle loses power; 3rd and 2nd gears still function; Occurs at speeds ranging 25-55 mph; Nearly caused accident during left turn with oncoming traffic
Repairs/costs cited: Dealership unable to duplicate problem after keeping vehicle 5+ days. No repairs completed.
Recalls/TSBs owners mention: Dealership inspection once; second inspection unable to replicate. Dealership manager suggested owner drive vehicle to dealership with problem active while in 3rd or 2nd gear.
Unexpected reverse engagement under load
Vehicle unexpectedly shifts into or behaves as if in reverse while being driven forward, causing loss of forward acceleration and requiring immediate shift to Park.
When: At 50,000 miles
Symptoms owners cite: Loss of forward acceleration at 30 mph; Vehicle begins to reverse; Failure occurred four separate times; Engine revving without forward movement
Repairs/costs cited: Independent mechanic diagnosed need for transmission replacement. Vehicle repaired but failure persisted after replacement.
Recalls/TSBs owners mention: Manufacturer not notified of failure.
Transmission lock-up and difficult shifting
Transmission locks up intermittently at various speeds, making vehicle difficult to shift. Occurs as early as 4,000 miles on new vehicle.
When: 4,000 miles initial failure; continued through 12,500 miles
Symptoms owners cite: Intermittent transmission lockup; Difficult to shift; Occurs at various speeds
Repairs/costs cited: Not yet repaired. Dealers stated unable to provide analysis unless failure occurs frequently.
Recalls/TSBs owners mention: Two different dealers consulted; Chevrolet stated nothing could be done. No repair completed.
Complete transmission failure with vibration precursor
Transmission stops functioning, limiting operation to 1st and 2nd gears only. Preceded by vibration issue months prior that dealer misdiagnosed as wheel balance.
When: At 80,000 miles; vibration reported several months prior
Symptoms owners cite: Only 1st and 2nd gears functional; Slight vibration for several months prior; Vibration persists even after transmission replacement
Repairs/costs cited: Local dealer quoted $2,800 for transmission replacement. Vehicle remained with dealer over one month. Final out-of-pocket cost $2,300 after GM covered 45%.
Recalls/TSBs owners mention: GM offered to pay 45% of repair cost. Dealer indicated warranty agreement caused final price to increase.
Torque converter slippage on inclines
Torque converter fails to hold vehicle on inclines, causing rollback after stops. Also slips at idle, creating rough idle condition.
When: Intermittent occurrences
Symptoms owners cite: Vehicle rolls backwards after stop on inclines; Torque converter slips in Drive, 3rd and 1st gears; Transmission locks only in 2nd gear; Rough idle while in gear at stops; Requires simultaneous gas and brake management to prevent rollback into traffic
Repairs/costs cited: Not specified in narrative
Transmission won't engage in Drive gear
Vehicle unable to shift into or operate in Drive gear; engine revs but no forward propulsion. Only 1st, 2nd, and Reverse gears functional.
When: Mileage not specified
Symptoms owners cite: No engagement in Drive gear; No engagement in 3rd gear; 1st, 2nd, and Reverse gears work; Engine revs in Drive with no movement; Multiple owners online reported identical problem
Repairs/costs cited: Not specified
Rough shifting between 1st and 2nd gear
Abrupt or harsh gear transition between 1st and 2nd, causing jerking motion during normal driving.
When: Timing not specified
Symptoms owners cite: Rough shift between 1st and 2nd gear
Repairs/costs cited: Not specified
Torque converter chatter and shuddering
Torque converter defect causes shuddering or chatter at both low and high speeds on vehicles under 100,000 miles.
When: Under 100,000 miles
Symptoms owners cite: Shuddering at low speeds; Shuddering at high speeds; Chatter from torque converter
Repairs/costs cited: Not specified
Service 4WD warning and transmission issues concurrent
Service 4WD error messages appear on display alongside transmission problems. Dealer recommends operating in 2WD instead of Auto mode.
When: Occurs on two occasions
Symptoms owners cite: Service 4 Wheel Drive error message; Display warning messages; Dealer suggests using 2WD instead of Auto mode
Codes mentioned: C0378
Repairs/costs cited: Not specified
Recalls/TSBs owners mention: Dealer inspection indicated everything checked out okay; recommended 2WD driving mode.
Synthesized from 22 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Tl* the contact owns a 2007 Chevrolet suburban 1500. The contact stated that while driving 45 MPH, the transmission failed. The vehicle was towed to a transmission specialist for inspection where they stated that the transmission needed to be repaired. The vehicle was repaired but the failure recurred. The manufacturer was notified and stated that the failure was not a common problem and that…
Had powertrain trouble with your 2007 Chevrolet Suburban?
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 2007 Chevrolet Suburban?
It's a documented issue but not catastrophic. 22 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 34,000 and 106,000 miles, with the median around 65,414. A quarter of owners report trouble before 34,000; a quarter make it past 106,000. 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/2007/Chevrolet/Suburban.
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.