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GMC
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Sierra 1500
GMC
Sierra 1500
Full-Size Truck
Best Engine
✅
Recommended
(3.9)
4
Generations
73
Engines Rated
10,679
Total Complaints
Engine Ratings
45 recommended
22 caution
6 avoid
Generation Timeline
2000-2006
GMT800
28 engines
3,698 complaints
🔥 63
☠ 12
5.3L 8-cyl
✅
Recommended
(3.9)
→
2007-2013
GMT900
24 engines
1,961 complaints
🔥 26
6.6L 8-cyl
✅
Recommended
(3.8)
→
2014-2018
K2XX
12 engines
2,409 complaints
🔥 26
☠ 1
6.6L Turbo 8-cyl
✅
Recommended
(3.9)
→
2019-2025
T1XX
9 engines
2,611 complaints
🔥 18
Unknown
✅
Recommended
(3.9)
→
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