There isn’t a single “best” cam for a stock 5.3 GMT800—what’s best depends on how you use the truck (towing, daily, street/strip) and how much supporting work you’re willing to do (springs, converter, tune). But there are a few proven combos that consistently work well on otherwise stock 5.3s.
Below are solid, common choices, assuming:
- Stock 5.3 LM7/LM4 in a GMT800 (Silverado/Sierra/Tahoe/Yukon/Suburban/Etc.)
- Stock bottom end
- Stock heads
- Typical bolt-ons (exhaust, intake) or even bone stock otherwise
- You’re willing to at least do valve springs and a tune
Best all‑around “truck cam” choices
1. BTR Truck Norris or Truck Norris NSR (No Springs Required)
- Truck Norris (regular): 212/22X @ .050, ~107–109 LSA (varies slightly by version)
- Needs springs and tune
- Choppy idle, strong midrange, great for a fun daily/ weekend truck
- Works with stock converter but a 2,400–2,800 stall makes it nicer
- Truck Norris NSR: Slightly milder, designed to run on stock springs, still needs a tune
- Best if you want performance bump and sound without pulling the heads for springs
Why it’s popular:
- Strong low–mid torque (good in a heavy truck)
- Excellent drivability with a tune
- Big seat‑of‑pants gain and lopey idle
2. Texas Speed 212/218 or 216/220 Truck Cams
- TSP 212/218 .550/.550 112–114 LSA
- Great all‑around street/tow cam
- Needs valve springs & tune
- Works on stock converter; 2,400+ stall is ideal if you want it really smooth
- TSP 216/220 .550/.550 112–114 LSA
- Slightly bigger, more upper‑RPM power, still decent manners
Why they’re good:
- Widely used, easy to tune, predictable results
- Nice power everywhere, still okay for daily + some towing
3. BTR Stage 2 Truck Cam (V2)
- Specs: ~212/218 .553/.553 111 LSA (check current V2 spec sheet)
- Needs springs, tune
- Good with stock converter, better with a small stall
- Choppy idle, big improvement from ~2,000–6,000 rpm
Why choose Stage 2:
- Very common on stock 5.3s, lots of data and support
- More aggressive sound and top‑end than the NSR / small cams but still streetable
If you want to keep everything else dead‑stock
- Use a mild NSR cam (like BTR Truck Norris NSR or similar small NSR from TSP/Comp) and still tune it.
- Pros: No springs, no converter, minimal parts cost.
- Cons: Less peak power than full truck cams; still absolutely noticeable over stock.
If you’re willing to change just springs + tune, the BTR Truck Norris, BTR Stage 2 Truck V2, or TSP 212/218 are usually the best bang‑for‑buck.
Match the cam to your use case
-
Daily driver / light towing / wants better grunt + sound, stock converter:
- BTR Truck Norris or TSP 212/218
-
Mostly work/tow truck, wants more power but keep manners very good:
- Mild cam like TSP 212/218 on a wider LSA (113–114) or an NSR cam
-
Fun street/strip truck, doesn’t tow heavy, okay with a converter:
- BTR Stage 2 Truck V2 or TSP 216/220 plus 2,400–2,800 stall
Minimum supporting mods you really should plan on
- Valve springs: Required for almost all truck cams except true NSR grinds.
- Tune: Absolutely required. Don’t cam an LS and skip tuning.
- New lifters/trays & pushrods (optional but smart, especially on higher miles):
- Stock parts can be reused, but upgrades improve reliability.
- Converter (optional but recommended above ~215° intake @ .050):
- Helps drivability, launch, and keeps the engine in the cam’s happy range.
Bottom line
- For a mostly stock 5.3 GMT800 wanting a strong all‑around upgrade and willing to do springs + tune, a BTR Truck Norris or TSP 212/218 is hard to beat.
- If you absolutely do not want to change springs, a Truck Norris NSR–style cam with a proper tune is about the best “drop‑in” choice.