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GMC Sierra 1500 Transmission Problems

407 TrueDelta members own (or used to own) a 2000 or newer GMC Sierra 1500. 35 of these members (8.6%) have reported transmission repairs for their car. A total of 51 transmission repairs to GMC Sierra 1500s--an average of 0.1 per vehicle--have been reported.

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently GMC Sierra 1500 problems occur, check out our car reliability stats.

Percentage of GMC Sierra 1500 repairs by problem area

Chart based on 385 repairs.

GMC Sierra 1500 transmission repair cost distribution

Chart based on 31 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten GMC Sierra 1500 repair histories. Log in or join us to see them all.

2008 GMC Sierra 1500 4dr Extended Cab 6.5ft bed

315-horsepower 5.3L V8 4-speed automatic 4WD w/low range

50000 mi   Front Diff Bearing Failure 
100000 US $375 Front differential noise 40 - 50 mph 

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2007 GMC Sierra 1500 4dr Extended Cab 6.5ft bed

315-horsepower 5.3L V8 4-speed automatic 4WD w/low range

105000 mi US $318 leaking front axle seals both 

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2007 GMC Sierra 1500 4dr Crew Cab 5.5ft bed

367-horsepower 6.0L V8 4-speed automatic 4WD w/low range

17360 mi   Transmission slips sometimes, clunks others, but normally works great 
5000   Software update for PCM/TCM and a lubrication of the slip-yolk. This was to fix rough transmission shifting when slowing to a stop. 

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2007 GMC Sierra 1500 4dr Crew Cab 5.5ft bed

315-horsepower 5.3L V8 4-speed automatic 4WD w/low range

6500 mi   leak around transmission repaired took a few days to complete 

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2004 GMC Sierra 1500 4dr Extended Cab 6.5ft bed

295-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range

40000 mi US $100 New intermediate steering shaft to fix steering clunk 
89000   4x4 transfer case had a hole in the housing, caused by broken anti-rattle clip that allowed the steel pump to rub against the softer magnesium housing. Well-known problem that affects higher mileage non-HD GMT-800 trucks. 
106000   Problem with 4x4 transfer case pump rubbing a hole in the external housing re-appeared. It wore through the JB Weld patch after about 11 months. Re-applied JB Weld. Will have to replace pump and get new half of the t-case housing next time it happens.  
128000   4x4 Transfer case pump wore another hole in the housing. Patched with JB Weld, ordered new rear case half and a part that will prevent the problem from happening again for install in the next couple weeks. 
135000   Installed parts to fix transfer case pump rub issue. 
213700   Service 4x4 warning message. I have put off for 2 years by keeping transfer case in Auto. Message was only displayed in 2wd mode. Problem is well known encoder motor sensor in the transfer case. I replaced the entire encoder motor. 
228500   Front differential seals leaking and actuator leakng. 

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2004 GMC Sierra 1500 4dr Extended Cab 6.5ft bed

285-horsepower 4.8L V8 4-speed automatic 4WD, part-time w/low range

80000 mi US $100 Front axle seals leaking. 

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2002 GMC Sierra 1500

Engine not specified

164140 mi   Front axle seal replaced 
170700   Transfer case replaced 

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2001 GMC Sierra 1500 4dr Extended Cab 6.5ft bed

285-horsepower 5.3L V8 4-speed automatic RWD

68200 mi C $350 Tow haul mode failed. Wire in gear shift broke. Replace gear shift lever 

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1999 GMC Sierra 1500

8-cylinder automatic AWD

127000 mi US $2600 Had Transmission rebuilt due to a previous loose and failed cooler hose. Drove with slight slippage for over a year and finally had it fixed. Trans was rebuilt as I plan to keep truck for a long time. 

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