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Transmission and drivetrainPart report

2004 GMC Sierra 2500 Transmission and drivetrain Problems

Complaints
9about this part
Share
6%of 143 total for the year
Median mileage
71,500miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 9 complaints about the transmission and drivetrain of the 2004 GMC Sierra 2500, 6% of the 143 complaints for this model year. Where a mileage was given, the median is 71,500 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I was leaving a parking lot, and as I hit my brakes, there were no brakes. I limped home, using the e-brake and transmission to keep the truck under control. Upon inspection I found the front brake line rusted and leaking.”

NHTSA complaint #10671448, filed 2015-01, 140,000 miles

“Flywheel on four locally owned GM trucks were reported being cracked or broken. Old parts are avail. Since then speedometer doesn't work properly and I am told there's no problem.”

NHTSA complaint #10167270, filed 2006-09, 53,000 miles

“The contact owns a 2004 Gmc SIERRA 2500 hd. The contact performed routine maintenance on the vehicle and observed that the transfer case (4 -wheel drive) contained pinholes, which LED to an internal fluid leak. The transfer case fluid level was completely empty. The locking clip failed, which contributed to the failure. The vehicle was taken to an independent transmission shop and the technician replaced the locking clip. The failure mileage was 120,000 and current mileage was 126,000.”

NHTSA complaint #10278713, filed 2009-07, 120,000 miles

“The contact owns a 2004 Gmc SIERRA 2500. The contact stated that the speedometer did not function properly and it would indicate a faster speed than he was actually driving. The oil pressure gauge also malfunctioned. The contact previously replaced both driver and passenger side carrier bearings that are associated with the four wheel drive. The contact was able to elevate the vehicle and move the wheel about a half inch in both directions. The vehicle had not been inspected when the complaint was filed. The contact called the manufacturer but was offered no assistance. …”

NHTSA complaint #10344147, filed 2010-07, 70,000 miles

“The contact owns a 2004 Gmc SIERRA 2500. While attempting to place the vehicle in reverse, the gear automatically shifted into neutral, causing the vehicle to coast backwards. Two days later, while driving at an unknown speed, the vehicle automatically disengaged out of two wheel drive and shifted into neutral. The vehicle would not accelerate so the contact safely pulled off the road and waited two minutes. He then pressed the button on the transfer case to re-engage the 4 wheel drive. He took his vehicle to the dealer and they replaced the transfer case control module and motor. …”

NHTSA complaint #10211054, filed 2007-12, 68,000 miles

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
202617%
2025311%
20242725%
20232061%
2022716%
20211325%
20202531%
201926%
201839%
2017616%
201612%
201589%
2014310%
2013511%
2012413%
2011610%
200835%
200722%
20061218%
200576%
200496%
2003138%
20021410%
200164%
200012%
199913%
1998320%

Other parts of the 2004 GMC Sierra 2500

Brakes
56 complaints
Electrical system
48 complaints
Engine
9 complaints
Engine cooling
9 complaints
Fuel system
8 complaints
Steering
7 complaints
Body and structure
5 complaints
Equipment
3 complaints
Tires
3 complaints
Visibility (wipers, defrost, mirrors)
3 complaints
Air bags
2 complaints
Electronic stability control
2 complaints

← All problems reported for the 2004 GMC Sierra 2500

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology