Vortech 1999-2006 4.8L/5.3L/6.0L Light Truck/SUV User Manual

Page 29

P/N: 4GL020-010

08OCT08 v5.0(99-07 GM Trk (4GLv5.0))

Regarding all GM vehicles with “ON-STAR” and Microtuner 2001. It has come to

our attention that GM vehicles equipped with “ON-STAR” communications may

have trouble being programmed with a Superchips Microtuner 2001. It appears

the “ON-STAR” system interrupts communications between the Microtuner 2001

unit and the vehicle’s PCM. In most cases this results in the following message

being displayed on the Microtuner 2001 “No response from PCM...” and after cy-

cling the ignition the vehicle can be started right back up.
Superchips is reviewing this and to temporarily correct for this situation, it is rec-

ommended that any vehicle to be programmed that has “ON-STAR” should follow

these additional steps FIRST.

1. Ensure the vehicle is off and keys are out of the ignition.

All model years up to 2002:

Locate “interior” fuse panel and remove Qty 2 SEO

labeled fuses.

Locate “exterior” fuse panel and remove Qty 1 SEO

labeled fuse.

2003-2004 Model years:

Locate “exterior” fuse panel and remove Qty 1 INFO labeled fuse.

2. Follow the instructions that came with the Microtuner.

Once programming is completed, ensure the vehicle is off and the keys are out

of the ingnition and install the fuses in the correct locations.
On GMC trucks, the interior fuse panel should be located to the left of the

instrument panel/dash board. If the panel faces the door, open the door to gain

full access.
On GMC trucks, the exterior fuse panel should be located under the hood on

the right hand side of the vehicle. It will be labeled Fuse Panel or similar.

NOTE: 2004 vehicles equipped with On-star that have aftermarket

stereos will experience problems with the ability to re-program

the vehicle’s ECM. It is necessary to disconnect the aftermar-

ket stereo from the factory wiring harness before continuing

with the programming procedure.

15. SUPERCHIPS nOTICE (2002 4.8L / 2000-2002 5.3L / 2003 6.0L Only)