GM AFM/DOD Delete & VVT Delete Tune | 2006–2026 Silverado, Sierra, Tahoe, Yukon, Escalade, Camaro | 4.3 5.3 6.0 6.2 | Mail-In ECM Tuning Service

Permanent AFM / DOD Delete + VVT Delete — Custom ECM Tune

Software-level Active Fuel Management (AFM) delete — also called Displacement on Demand (DOD) delete — for 2006–2026 GM Gen IV and Gen V (EcoTec3) V6 and V8 engines: 4.3L, 5.3L, 6.0L, and 6.2L. On 2019+ trucks and SUVs this covers Dynamic Fuel Management (DFM) delete as well. On applicable engines we also disable Variable Valve Timing (VVT) and remove factory throttle lag — no check engine light, no codes.

Unlike a plug-in Range AFM Disabler ($236.95+ that has to stay plugged in forever), this is a permanent custom tune written directly to your ECM — one time, done. No dongles, no OBD2 plug-ins, no battery drain.

Why Delete AFM/DOD/DFM?

• AFM/DFM is the #1 cause of collapsed lifters, lifter tick, and camshaft failure on GM 5.3 and 6.2 engines. Deleting it in the tune:

• Locks the engine in full-cylinder (V8) mode — no 4-cylinder AFM or 17-pattern DFM deactivation

• Eliminates AFM/DFM lifter failure risk on the software side

• Stops torque converter shudder and constant lockup cycling from cylinder deactivation

• Fixes AFM oil consumption complaints on Gen IV 5.3s

• Removes throttle lag for sharper pedal response

• Smooths part-throttle drivability and towing behavior

Note: The tune disables cylinder deactivation. If your engine already has a failing AFM/DFM lifter (audible tick/misfire), it needs mechanical repair — a tune can't fix damaged hardware. This tune is the right move on healthy engines and mandatory after an AFM/DFM delete kit or cam swap install.

Supported Vehicles

2006–2018 (Trucks & SUVs): Chevy Silverado 1500/2500, GMC Sierra 1500/2500, Tahoe, Suburban, Yukon, Yukon XL, Yukon Denali, Avalanche, Cadillac Escalade, Trailblazer, Envoy, Rainier, Saab 9-7x 2006–2018 (Cars): Camaro SS (L99 auto & LT1), Corvette LT1, Impala SS, Monte Carlo SS, Pontiac G8 GT, Grand Prix GXP, Buick LaCrosse Super, Caprice PPV 2019–2026 (DFM platforms): Silverado 1500, Sierra 1500, Tahoe, Suburban, Yukon, Yukon XL, Escalade/ESV, Camaro SS

Engines: 4.3 LV3 EcoTec3 • 5.3 LC9/LMG/LY5/LH6/LS4/L83/L82/L84 • 6.0 L76/L77/LY6/L96 • 6.2 L9H/L94/L99/L86/L87/LT1

Not sure if your engine has AFM/DFM or VVT? Send your VIN — we'll confirm before you ship anything.

Important: 2019+ Vehicles Require an ECM Unlock

• 2019 and newer GM trucks and SUVs use a locked ECM (Global A E90/E92 and Global B E01/E66/E90). Before any tune can be written, these ECMs must be unlocked through HP Tuners' official unlock service — a per-ECM cost billed in addition to the tuning service.

• We pass the unlock cost through at HP Tuners' published rate; it is quoted per vehicle before work begins.

• 2025–2026 and some 2022.5+ Global B models are RTD-only (Remote Tuning Device — tuned in-vehicle, not on the bench). If your vehicle falls in this group, message us first so we can confirm the correct process before you ship anything.

• 2006–2018 vehicles do not require an unlock — those are covered at the standard service price below.

How the Mail-In Service Works

• Order the service and ship us your ECM/PCM (or purchase a pre-programmed exchange ECM — $100 core deposit, refunded on core return)

• We write the AFM/DOD/DFM delete + VVT delete calibration with HP Tuners professional software

• ECM ships back, plug in and drive — fast nationwide turnaround

Pricing

• 2006–2016 vehicles: $125

• 2017–2018 vehicles: $225 (later-generation E92 ECM requires additional licensing)

• 2019–2026 vehicles: quoted per vehicle — includes DFM delete tuning plus the required HP Tuners ECM unlock (see link above)