The GM full-size truck platform has evolved dramatically over the past 25 years — and each generation has its fans, its strengths, and its weaknesses. Which one gives you the most truck for your money right now?
GMT800 (1999–2006) — The Budget Sweet Spot
Why people love it: Mechanically simple, cheap to work on, parts everywhere, no complex electronics. The 5.3L Vortec is one of the most robust engines GM ever made.
Current market: $4,000–$12,000 for clean examples
What to watch: Intake manifold gaskets on 5.7L, 4L60E condition, rust on northern trucks
Best for: DIY mechanics, daily drivers on a budget, anyone who doesn’t need modern tech
GMT900 (2007–2013) — Best Bang for the Buck Right Now
Why people love it: Better body and interior than GMT800, more modern, still mechanically straightforward. The 5.3L and 6.2L are excellent engines. More features (Bluetooth, backup camera on later models).
Current market: $8,000–$22,000
What to watch: AFM lifter issues, 5.3L oil consumption, 6L80 fluid maintenance
Best for: The sweet spot between affordability and modern capability — arguably the best value pick in the market right now
K2XX (2014–2018) — More Features, More Money
Why people love it: Modern styling, better interior quality, EcoTec3 engines, available 6.2L, K2XX chassis is very good. More aftermarket support than ever.
Current market: $18,000–$35,000
What to watch: 8L90 shift quality, DI carbon buildup, AFM still present
Best for: Owners who want more tech and newer styling at a mid-tier price point
T1XX (2019+) — Modern but Pricey
Why people love it: Best powertrain options ever (2.7T, 3.0L Diesel, 6.2L), best ride and handling, best interior
Current market: $28,000–$60,000+ new/CPO
What to watch: 10-speed hunting, DFM issues, higher repair costs
Best for: Those who can stretch the budget for the latest tech and capability
The Honest Summary
| Generation | Best Reason to Buy | Main Concern |
|---|---|---|
| GMT800 | Price, simplicity | Age, rust |
| GMT900 | Best value overall | AFM lifters |
| K2XX | Features + value | 8-speed trans |
| T1XX | Everything modern | Price |
What generation do you own, and would you buy it again? Drop your thoughts below.