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6.5L Chevy GMC OBDII Performance Computer

1996 - 2000 Chevy GMC 6.5L TD
ECM Performance Computer Upgrade +65 - 70hp rated at the engine.

This item requires a Core Return or Core Charge

Please see link below for more information

Pricing: $650.00

Customize Your Item

- Select 'Core Charge' Option -
 * required
 * required
 * required
 * required
- Transmission Type -
 * required
- Desired Performance Level -
- Mass Airflow Sensor in Airbox -


Chevy 6.5L Performance Computer adds + 65-70 horsepower. Fits 1996 - 2000 6.5L Chevy Diesel. Part # 65COMPUTER.

The 6.5L is a substantially strong engine design and is capable of far greater performance than it delivers in factory-stock form. Our components alter fueling, timing, boost, increased glow plug time for better starts and revised idle speed for smoother operation. This vastly improves engine combustion efficiency, adding approximately 65 hp and 150 lb/ft torque along with improved fuel economy. These components combine to transform your 6.5L into a very respectable performer and great towing vehicle.

You will need to provide us with the following information when ordering:

Year: Located on the sticker on the door jam
VIN Code: Located behind the glove compartment
Transmission Type:
Automatic or Manual
Injection Pump Model:
(See photo below for locating the pump model #)
Desired level of performance:
Performance Tow or Max Effort
Mass Airflow Sensor in Airbox:
Yes or No

Locating the DS4 Injection Pump Model Number
The DS4 injection pump model number is located on the first line of the tag attached to the back of the injection pump. It will read as "DS4831-xxxx", with those last four digits being the pump model number:

DS4 Pump Model Location

Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W8.0000” x H4.0000” x L8.0000”

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