Same problem as him.gwukena wrote:99 silverado 4wd ext cab 5.3
Predator U7198 Software rev 2.12
After installing either predator tune, giving 3/4 to full throttle at 1-2 shift, code p0748 is set. Trans shifts hard, if I clear code trans operation normal until throttle mashed again for 1-2 shift. Shutting off truck and driving normal okay, code set once throttle mashed again for 1-2 shift. Does not set this code with factory tune.
Please help
Gary
99 sierra 2wd reg cab 4.8
predator u7198
Software rev 2.11
Can I also get this is the tune?
In alaska there is nothing above 91 octane.
I have a k&n FIPK ,granatelli maf, and 3 inch dual exhuast.
Thanks ahead of time.
Attached is my factory tune
