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EnginePart report

2007 GMC Sierra 2500 Engine Problems

Complaints
1about this part
Share
1%of 83 total for the year
Median mileage
83,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 1 complaints about the engine of the 2007 GMC Sierra 2500, 1% of the 83 complaints for this model year. Where a mileage was given, the median is 83,000 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.

“General motors Gmc sierra duramax equipped pick up trucks (lmm series) have an issue with leaking transmission cooling lines where the rubber hoses are crimped to the steel connectors. The problem is a fire hazard due to leaking transmission fluid. Gm has already issued replacement of these hoses for the 2008 model year. In 2007 GM had a split year offering for the duramax. The 2007 version was a series lbz. In the second half of 2007 (due to emissions requirements) Gmc introduced the model year designation 2007.5. The 2007.5 were the first of the lmm series. …”

NHTSA complaint #10692424, filed 2015-03, 83,000 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
202618%
2025414%
20241211%
202339%
202249%
2021815%
20201013%
2019619%
2018823%
2017616%
2016915%
201578%
2014310%
201312%
2012310%
201158%
2010110%
200926%
200846%
200711%
200554%
200496%
200364%
200221%
200186%

Other parts of the 2007 GMC Sierra 2500

Air bags
49 complaints
Other or unknown
9 complaints
Body and structure
7 complaints
Brakes
6 complaints
Electrical system
5 complaints
Fuel system
3 complaints
Seat belts
3 complaints
Steering
3 complaints
Suspension
3 complaints
Engine cooling
2 complaints
Tires
2 complaints
Transmission and drivetrain
2 complaints

← All problems reported for the 2007 GMC Sierra 2500

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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