Question about 2003 Chevrolet Silverado 2500HD

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Just installed a hypertech max energy programmer on my 2003 chevy 2500hd with 6.0 gas. Now it idles at a real low rpm and if you turn the a/c on at idle it acts as if its gonna die.......ever heard of this or is there a rpm adjust on the programmer ...please help

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SOURCE: 1997 cheyv k1500 i want speed and more horsepower

First need to know what engine, and how much your willing to spend? You could add underdrive pullys, a better throttle body or even a new intake to get some more power, Also could change the gearing in your front and rear axles to a lower gear raito to change where your pwer would be more usefull I.E. 3.20: 1 would make it faster overall but 4.10:1 would make it faster of the line or more capiable for towing. hope that helps.

Posted on Jul 16, 2009

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SOURCE: my 2005 chvey 2500hd diesel truck will not start,

on the back of the engine close to the firewall by the glow plug controller is a high pressure oil switch. if this switch goes out diesel fuel will not reach the injector pump.try pulling the molex and jumping it out with a wire. if it starts. replace the switch. it takes an extra deep socket designed for that switch that can be purchased at any auto supply. good luck!

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SOURCE: 97 chevy pu 305 vortec, had cyl 6 misfire and

thats usually a sign of a vacuum leak, recheck and make sure you don't have any loose hoses, or cut intake seals

Posted on Nov 12, 2010

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1 Answer

Obd code C0502 on 97 chevy k1500


CO502 is a Vehicle Speed Sensor Code. I'm working on trying to resolve an issue with my own right now. I know I had some wiring issues a while back with the VSS and thought I had it all resolved. I didn't know that I still had an issue until I was installing my Hypertech Max Energy Power Programmer today when it gave me this code.

Sep 16, 2013 | 1998 Chevrolet K1500

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On a 2001 chevy silverado 2500HD the ac blows cool in idle or slow speeds but while driving the air gets warm and then cool warm and then cool etc. i cant tell if the compressor is cutting on and off


You might be low on freon if not compressor going bad to see if your compressor is going on and off turn on a/c on max have some one hold gas peddle down around 1500 rpm or just at a small fast idleif compressor goes on and off recharge it most likely one or two cans will be enough

Aug 24, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

How do i bypass the governer?


you have to get a programmer such as a hypertech max energy product. and you have to get one specific to the model of your car. there are many different brands but that should get you in the right direction. http://www.hypertech.com/products-results.aspx. remember the govener is set to the speed rating of your tires.

Jan 10, 2011 | 1994 Buick Roadmaster

1 Answer

How do I change the cooling fans to kick on sooner than they do? I live in the desert and its very hot! I put in a new thermostat which is better suited for my climate...but how do I get the fans to kick...


The only fix I have found besides adding a switch to the common terminal of the fan relay, and a ground, is to pick up the following ECU programmer from Corvette Central:

Click Here

Hypertech's Max Energy Programmer allows you to set engine cooling fan on/off settings, set top-speed limiter, engine RPM "Rev" limiter and even transmission shift points and firmness. Hypertech's Corvette Max Energy Programmers also allow you to return to stock settings or change settings anytime. Have you changed your tire and wheel size or differential, if so, and then you can make your speedometer corrections by using Hypertech's Max Energy Programmer.

It costs around $400 bucks, so definitely not a cheap fix, but it is a better fix.

Jul 17, 2010 | 2004 Chevrolet Corvette

1 Answer

2003 Chevy 2500HD 8.1 Allison 4x4. Truck runs 100% fine. Each day when started MIL comes on codes P0700 and P1779 are present. I know what they stand for but have no idea how to fix. If codes are cleared...


I have the same exact truck as you do and had a similar problem awhile ago when i installed the hypertech system. I had to uninstall the hypertech and then have a buddy (cause i did not know how) drain the residual power from the brain... apparenlty the brain houses a small amount of power and remembers these codes so after you turn off your truck...poof there they are again. This worked for me, but then I had other electrical problems so I the dealership had to replace the brain.

Feb 08, 2010 | 2003 Chevrolet Silverado 2500HD

1 Answer

My wheels are squeaking. The squeak starts just


you need to change your brakes. they have squeaker tabs on them to let you know they are worn real low.

Sep 05, 2009 | 2003 Chevrolet Silverado 2500HD

1 Answer

1997 cheyv k1500 i want speed and more horsepower


First need to know what engine, and how much your willing to spend? You could add underdrive pullys, a better throttle body or even a new intake to get some more power, Also could change the gearing in your front and rear axles to a lower gear raito to change where your pwer would be more usefull I.E. 3.20: 1 would make it faster overall but 4.10:1 would make it faster of the line or more capiable for towing. hope that helps.

Jul 16, 2009 | 1997 Chevrolet K1500

1 Answer

2003 chevy silverado runs rich with black smut in tail pipes!


You have upset the air flow meter You need to replace the air box lid.the flow of air past the airflow meter must be comsistant and surge free.the factory match the flow of air to the afm and they are like siamese twins,they are a matched pair.If you return the air box and rest of air intake to factory parts your problem will go away.Im sure these problems began to appear when you started changing parts and cutting holes.Good luck

Oct 17, 2008 | 1999 Chevrolet Silverado 1500

1 Answer

Can't find Nav fuse


I have a 2008 GMC Sierra 2500HD Duramax and use the HyperTech software also. I assume you are talking about the installation instructions for HyperTech where it tells you to remove the ONStar and Radio fuse. Look in the owners manual for the fuse box layout under the hood. On mine, it's in the Duramax book and the only fuse that applies is the one listed for the Audio System. You will need to reset your clock when finished.

Sep 02, 2008 | 2008 GMC Sierra 2500HD 2WD

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