If your 2003–2006 GM truck’s speedometer is pegged at 120 or the fuel gauge is lying, the cluster’s stepper motors have failed. Here’s how to confirm it and the three ways to fix it, from a $30 solder job to a full cluster.
Silverado Gauges Not Working? GMT800 Cluster Stepper Motor Fix (2003–2006) Read Post »
Chevy 5.3 burning oil? AFM-equipped 5.3s are the known oil consumers. Here are the real causes ranked, how to confirm them, and the fixes that actually work.
5.3 Oil Consumption: Why Your Chevy 5.3 Burns Oil and How to Fix It Read Post »
Chevy/GMC 4WD not engaging with a Service 4WD light? The two usual culprits are the transfer case encoder motor and the TCCM. Diagnose it in the right order before you throw parts.
Chevy 4WD Not Engaging: Service 4WD Light, Encoder Motor and TCCM Diagnosis Read Post »
6.2L Chevy V8 specs: the L86 and L87 EcoTec3 make 420 hp and 460 lb-ft. Years, applications, AFM vs DFM, reliability notes, and which 6.2 to buy.
6.2L Chevy V8 Specs: L86 vs L87 Horsepower, Torque and Which Trucks Got It Read Post »
4L60E vs 4L80E: torque capacity, size, weight, how to tell them apart, which trucks got each, and when the 4L80E swap is actually worth it.
4L60E vs 4L80E: Differences, Strength and When to Swap Read Post »
6.0 Vortec specs for the LQ4, LQ9, LY6 and L96 — horsepower, torque, block and head material, applications, and which iron-block 6.0 is the one to build.
6.0 Vortec Specs: LQ4, LQ9, LY6 & L96 Horsepower, Torque and Differences Read Post »
GMT800 engine guide: compare the 4.8, 5.3, 6.0 and 8.1 Vortec — specs, reliability, towing, and which Silverado/Sierra engine to actually buy.
GMT800 Engine Guide: 4.8 vs 5.3 vs 6.0 vs 8.1 — Which to Buy Read Post »
The full 8.1L Vortec (Vortec 8100 / RPO L18) spec sheet: up to 340 hp, 455 lb-ft, 496 cubic inches, bore/stroke, and which trucks got it. It’s gas, not diesel.
8.1L Vortec Specs: Horsepower, Torque & Everything on the Vortec 8100 Read Post »
Most 2003–2006 GMT800 trucks shipped with no cabin air filter but the HVAC slot is molded in. A 20–30 minute retrofit: where it is, how to cut the opening without hitting the evaporator, and filter orientation.
GMT800 Cabin Air Filter Retrofit (2003–2006 Silverado & Sierra) Read Post »
A 99–02 GMT800 double-DIN swap done right: why it isn’t a direct fit, the correct conversion bezel, the dash tab you must trim, and the wiring/antenna adapters — no cut factory harness.
