1989 – 1998 · 1 body style available
GMT400
The last genuinely simple GM full-size truck. Cheap to fix, and rusting everywhere.
GMC Sierra (GMT400) Buyer's Guide
The GMT400 Sierra, built from 1988 through 1998, is the last genuinely simple full-size GM pickup and remains a staple work truck and a growing enthusiast favourite. Small-block V8s, a straightforward chassis, and universal parts availability make it one of
1999 – 2006 · 1 body style available
GMT800
Arguably the best-value used full-size truck. Durable Vortec V8s, corroding brake lines.
GMC Sierra (GMT800) Buyer's Guide
The GMT800 Sierra, sold from 1999 to 2006, is widely regarded as one of the best-value used full-size trucks available. The Vortec V8 family is durable, the chassis is stout, parts are cheap and universal, and the trucks are simple enough that most
2007 – 2013 · 1 body style available
GMT900
Better truck than the GMT800, but this is where Active Fuel Management starts eating camshafts.
GMC Sierra (GMT900) Buyer's Guide
The GMT900 Sierra, sold from 2007 to 2013, improved substantially over the GMT800 in interior quality, refinement, and safety, and remains a lot of truck for the money. It also introduced the single issue that defines used GM truck ownership from this point
2014 – 2018 · 1 body style available
K2XX
EcoTec3 engines and a much better cabin, plus eight-speed shudder on top of continuing AFM.
GMC Sierra (K2XX) Buyer's Guide
The K2XX Sierra, sold from 2014 to 2018, brought the EcoTec3 engine family, a much better interior, and improved refinement over the GMT900. It is a genuinely good truck, and the two things to understand before buying are both well documented. AFM continues.
2019 – present · 1 body style available
T1XX
MultiPro tailgate, a fine Duramax six, DFM lifter risk, and the big L87 6.2 recall.
GMC Sierra (T1XX, 2019+) Buyer's Guide
The T1XX Sierra arrived for 2019 with a larger body, the MultiPro tailgate, an available carbon-composite bed, and eventually a much improved interior after the widely criticised 2019 to 2021 cabin was replaced in the 2022 refresh. It is the most capable and
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Four severity levels
Every Squeezed guide sorts findings from Critical to OK, so you see the deal-breakers on the Sierra before anything else.
Frequently asked questions
What generations of the GMC Sierra are there?
GMT400 (1989 to 1998); GMT800 (1999 to 2006); GMT900 (2007 to 2013); K2XX (2014 to 2018); T1XX (2019 to present).
What are the common problems with the GMC Sierra?
Documented problems include Structural and Body Rust, Brake and Fuel Line Corrosion, Duramax LB7 Injector Failure (2001-2004). Which ones apply depends on the generation, so open the year you are considering for its recalls, complaints and a full breakdown.
Should I get a pre-purchase inspection on a used GMC Sierra?
Yes. A Squeezed guide is the triage before the inspection: it shows what to check and what to ask the seller, so you know which listings are worth a mechanic's time.