GM Global A E90 ECM Unlock & Tuning Service – Silverado / Sierra

Unlock Full HP Tuners Access for Your 2019-2022 Chevy Silverado or GMC Sierra – Disable DFM & More.

Mail in your ECM or drop off in Atlanta for a one-time unlock + optional custom tuning. Eliminate Dynamic Fuel Management annoyances, remove speed limits, and unlock real performance gains.

Supported Vehicles & ECM

2019–2022 Chevrolet Silverado 1500 & GMC Sierra 1500 (5.3L L84 & 6.2L L87 engines)
GM Global A E90 ECM (pre-facelift / non-Global B models)

Requirements

Remove and send your ECM (or bring to our Atlanta shop)
Requires HP Tuners MPVI interface for post-unlock flashing
Local removal/reinstall labor: $150

Shipping Instructions (Mail-In)

Purchase the Service
Fill out the service form (place the order first, you need your order # to complete the form). There is also link to this form in the main menu of the website.
Remove ECM (under hood, driver side, under intake box)
Package securely with padding
Ship to:
PCM Tuners
[YOUR ORDER NUMBER]
367 N Clarendon Ave, Unit 7
Scottdale, GA 30079

Turnaround Time

1–3 business days after receipt
Tracked USPS return shipping (included)
Rush options available – contact us

Pricing

Service	Price
E90 ECM Unlock – Includes the cost of the 6 HP Tuners Credits (value of $300)	$450
Edit Basic Settings- Add DFM Disable, Speed Governor removal, DTC Disable	Free
Premium Tune – Everything in basic tuning, plus we add power, torque, and throttle response	+$150
ECM Removal + Reinstall (Atlanta shop)	+$150

What This Unlock Enables

Full read/write with HP Tuners VCM Suite
Custom tunes for power, drivability, towing
DFM (Dynamic Fuel Management) disable for constant V8 power
Speed limiter removal, throttle optimization, and more

Ready to transform your truck? Order now and feel the difference – smoother power, no DFM hesitation!

CHOOSE YOUR SERVICE LEVEL

1) ECU Unlock

ECM unlock for HP Tuners access

2) Basic Tune Options – Add These Custom Adjustments

Build on the unlock with targeted edits for better daily driving and performance:

DFM/DFM Disable – Keeps full V8 mode always active for smoother acceleration and reduced wear
Speed Governor Removal – Raise or eliminate top speed limiter
Other Basic Settings – Adjust rev limiter, tire size calibration, DTC deletes, etc.

3) Premium Service, Full Performance Tune – Max Power & Drivability

Our premium custom tune optimizes everything for real-world gains on stock hardware (premium 91/93 octane recommended):

Includes all Enhanced Tune Options above
Optimized ignition timing, air/fuel ratios, torque management, power enrichment, better throttle response
Estimated gains (typical wheel numbers, stock setup):
5.3L – +22 HP / +25 TQ
6.2L – +25 HP / +28 TQ
Gains vary by setup/conditions and are estimates from world results from similar vehicles

🔑 Primary Keywords
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Fast • Reliable • Atlanta-Based • Thousands of Happy Customers

2019–Current Sierra 1500

Compatible products

Custom HP Tuners Calibration — File Only

GM Global A E90 ECM Unlock Service Silverado/Sierra 5.3 6.2 Available DOD/DFM Disable + Tune

Remote Tuning Package — MPVI4 + Custom Tune

GM Remote Tuning Package — RTD4 + Custom Tune

All GM Mail-In ECM/PCM Tuning