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Wester's Garage logo

GM Application List (1996-2007 GenIII)


Pricing and Information

  • All custom tunes on this page are priced at $350.
  • If you do not find your GM vehicle on this list, please check the GMLAN list.
  • In-vehicle and bench tuning is available for most vehicles on this page. Add $70 for PCM swaps or PCMs that were not originally programmed for your vehicle.
  • An additional cash deposit or charge card authorization of $120 is required for PCM swaps to cover the cost of our PCM should it not be returned within 30 days. No additional core costs apply for in-vehicle tunes or tunes using your supplied PCM.
  • Processing time is within one business day after receipt.
  • Stock flashes for any vehicle on this page are $70 plus shipping.
  • Ground shipping is included for custom tunes. Contact us for special shipping arrangements. You will be responsible for shipping charges for other than ground shipping.
  • Wester's can tune for just about any engine modification on the vehicles in this list (greater displacement, cams, long-tube headers, etc.). The engine displacement in this list refers to original displacement prior to modifications.
  • Dyno tuning and diagnostics are not available for these custom tunes.
  • For GM vehicles not listed here or on the GMLAN list, please contact us, as we are constantly updating our application list.

Application List

  • 2BAR Speed Density for 1999-2002 GM LS1 4.8L, 5.3L, 5.7L, 6.0L and 8.1L Car and Truck Auto and Manual Trans
  • 1996-1999 4.6L Northstar with Manual Transmission

TRUCKS / SUVs

  ' 96 ' 97 '98 '99 '00 '01 ' 02 ' 03 '04 '05 '06 '07 '08 '09 '10
Buick Rainier - - - - - - - - IL 4.2
5.3 V8 		IL 4.2 - - - - -
Cadillac Escalade - - 5.7 5.7 5.7
6.0 		6.0 6.0 6.0 6.0 6.0 6.0 - - - -
Chevy Astro Van /
GMC Safari 		4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 - - - -
Chevy Avalanche - - - - - 5.3 -
8.1 		5.3 -
8.1 		5.3 -
8.1 		5.3 -
8.1 		5.3 -
8.1 		5.3 -
8.1 		- - - -
Chevy Blazer / S10 / S15 / GMC Jimmy 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 - - - - -
Chevy Express /
GMC Savana

2007 Engines
VIN G, T, V, U, Z

4.3
5.0
5.7
6.5TD
7.4 		4.3
5.0
5.7
6.5TD
7.4 		4.3
5.0
5.7
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4
8.1 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4
8.1 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4
8.1 		4.3
4.8
5.3
6.0
8.1 		4.3
4.8
5.3
6.0
8.1 		4.3
4.8
5.3
6.0
8.1 		4.3
4.8
5.3
6.0
8.1
  		- - -
Chevy Kodiak /
GMC Topkick /
Workhorse 4500-5500 		6.5TD
7.4 		6.5TD
7.4 		6.5TD
7.4 		6.5TD
7.4 		6.5TD
7.4 		6.5TD
6.6LB7 		6.5TD
6.6LB7 		6.5TD
6.6LB7 		6.5TD
6.6LB7
6.6LLY
8.1 		6.5TD
6.6LLY
8.1 		6.5TD
6.6LLY
8.1 		8.1 8.1 8.1 8.1
Chevy Silverado /
GMC Sierra

(6.6 - Duramax)
2007 Engines
VIN G, T, V, U, Z

4.3
5.0
5.7
6.5TD
7.4 		4.3
5.0
5.7
6.5TD
7.4 		4.3
5.0
5.7
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.3
4.8
5.0
5.3
5.7
6.0
6.5TD
7.4
6.6
7.4
8.1 		4.3
4.8
5.3
6.0
6.5TD
6.6LB7
8.1 		4.3
4.8
5.3
6.0
6.6LB7
8.1 		4.3
4.8
5.3
6.0
6.6LB7-
6.6LLY
8.1 		4.3
4.8
5.3
6.0
6.6LLY
8.1 		4.3
4.8
5.3
6.0
8.1 		4.3
4.8
5.3
6.0
8.1 		- - -
Chevy SSR - - - - - -

-

5.3 5.3   - - - - -
Chevy Suburban /
GMC Yukon
& Denali

2007 Engines
VIN G, T, V, U, Z

5.7
6.5TD
7.4 		5.0
5.7
6.5TD
7.4 		5.0
5.7
6.5TD
7.4 		4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.8
5.0
5.3
5.7
6.0
6.5TD
7.4 		4.8
5.3
6.0
6.5TD
8.1 		4.8
5.3
6.0
6.5TD
8.1 		4.8
5.3
6.0
8.1 		4.8
5.3
6.0
8.1 		4.8
5.3
6.0
8.1 		4.8
5.3
6.0
8.1 		4.8
5.3
6.0
8.1 		- - -
Chevy Tahoe 5.0
5.7
6.5TD 		5.0
5.7
6.5TD 		5.0
5.7
6.5TD 		4.8
5.0
5.3
5.7
6.5TD 		- 4.8
5.3 		4.8
5.3 		4.8
5.3 		4.8
5.3 		4.8
5.3 		4.8
5.3 		4.8
5.3 		- - -
Chevy Trailblazer - - - - - - IL 4.2
4.3 		IL 4.2 IL 4.2 IL 4.2 - - - - -
GMC Envoy - - - - - - IL 4.2 IL 4.2 IL 4.2 IL 4.2
5.3 V8 		- - - - -
Hummer H1 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.5TD 6.6LLY TD

-

- - -
Hummer H2 - - - - - - - 6.0 V8 6.0 V8 6.0 V8 6.0 V8 6.0 V8 - - -
Isuzu Ascender - - - - - -

-

IL 4.2
5.3 V8 		IL 4.2
5.3 V8 		IL 4.2
5.3 V8 		- - - - -
Oldsmobile Bravada - - 4.3 4.3 4.3 4.3 4.2 IL 4.2
4.3 		IL 4.2 IL 4.2 - - - - -
Saab 9-7X - - - - - - - - - IL 4.2 - - - - -

 

V6 CARS

  ' 96 ' 97 '98 '99 '00 '01 ' 02 ' 03 '04 '05
Buick Century 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 - -
Buick LaSabre / Park Ave 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8
Buick Regal / Riviera 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8
Chevy Camaro - Firebird 3800
Not a
 '97 ECM 		3800 3800 3800 3800 3800 3800

-

- -
Chevy Impala - - - - 3.4 -
3.8 		3.4 -
3.8 		3.4 -
3.8 		3.4 -
3.8 		3.4
3.8
3.8SC 		3.4
3.8
3.8SC
Chevy Lumina 3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.8

-

- -
Chevy Malibu 3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.4 - -
Chevy Monte Carlo

-

?

3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.1
3.4
3.8 		3.4
3.8
3.8SC 		3.4
3.8
3.8SC
Oldsmobile Alero -

-

3.4 3.4 3.4 3.4 3.4

-

   
Oldsmobile Aurora 4.0 4.0 4.0 4.0 4.0 - - - - -
Oldsmobile Intrigue

(3.5 - DOHC LX5)

- - 3.8 L36 3.5
3.8 L36 		3.5 3.5 3.5

-

- -
Pontiac Bonneville 3.8 3.8 3.8
3800SC 		3.8
3800SC 		3.8
3800SC 		3.8
3800SC 		3.8
3800SC 		3.8
3.8SC 		3.8
3.8SC 		3.8
3.8SC
Pontiac Grand Am - - 3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.1
3.4 		3.4 3.4 3.4
Pontiac Grand Prix - - 3.1
3.8 		3.1
3.8 		3.1
3.8 		3.1
3.8 		3.1
3.8 		3.1
3.8 		3.8 Soon...
Pontiac GTP ? ?

-

-

-

-

-

-

- -

 

V8 CARS

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  ' 96 ' 97 '98 '99 '00 '01 ' 02 ' 03 '04 '05 '06
Casillac CTS-V - - - - - - - - 5.7 LS1 - -
Chevy Camaro 5.7 LT1 5.7 LT1 5.7 LS1 3.8
5.7 LS1 		5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1

-

- -
Chevy Corvette 5.7 LT1 5.7 LT1 -
5.7 LT4 		5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1

-

5.7 LS1 - -
GM Holden Adventra - - - 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1
GM Holden Commodore - - - 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1

-

GM Holden Coupe - - - - - - - - - - 5.7 LS1
GM Holden Crewman - - - - - - - - - - 5.7 LS1
GM Holden Monaro - - - - - 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1

-

GM Holden Sedan - - - - - - - - - - 5.7 LS1
GM Holden Ute - - - - - - - - - - 5.7 LS1
Oldsmobile Shelby 1 - - - 4.0 Northstar

-

- - - - - -
Pontiac Firebird 5.7 LT1 5.7 LT1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 -

-

- -
Pontiac GTO - - - - - - - - 5.7 LS1 - -
Pontiac Trans Am 5.7 LT1 5.7 LT1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 5.7 LS1 -

-

- -