OBDII Codes 2006 Chevy 2500HD w/ 6.6L Duramax "Truck started losing power when warm, when the truck is cold for the first 10 miles or so the trunk runs great. If you give the truck full throttle it barley will take off give the truck 1/4 to 1/3 throttle all seems ok. I can run highway speeds I also have a check engine come on about three minutes after the problem started. There are 6 reported errors U0100, P2564, P003a, P0700, P0108, P2563"

SOURCE: my truck loses power

In most cases it is the fuel filter. I don't know when it was changed before, but it should be changed at least every 8-10 k miles. Make sure you change the air filter too.

SOURCE: 1998 chevy K1500 timing runs ok for 10 miles then loses all pwr

1-timing on truck is ajusted by ecm,when u moved it u cause cam sensor code because it detected timing was off! 2-o2 sensors has the role of detecting air to fuel ratio coming out of exhaust,sends signal to ecm wich collects data from other sensors from that sets timing for best performance,if ecm detects something wrong in system data it will give engine code,that code will point at problem area,in your case o2 sensors probably detected lean fuel ratio that points to fuel system,blocked fuel filter or fuel pump faillure,elect,circuit damage,hope it helped!

SOURCE: CHEVY SILVERADO 2500HD DURAMAX DIESEL

replaced fuel pump on 2003 duramx diesel, but there's no power to it?

SOURCE: 2003 Chevy 2500HD 8.1 allison 4x4. Truck runs 100%

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.

Jay Finke

• 1397 Answers
• Posted on May 25, 2010

SOURCE: 1988 chevy truck 2500 5.7 engine. After engine

EATHER IS NOT GOOD , ITS FOR COLD COLD MOTORS.. CHECK YOUR FUEL PRESSURE AND GAS FILTER .YOU MIGHT HAVE A BAD FUEL PUMP ITS IN THE GAS TANK!!! . USE CARB & CHOKE CLEANER ..PARTS MASTER # 1736 ..ITS NOT AS HOT AND WONT POP A HEAD GASKET .IF'N I WAS ANY HELP AT ALL PLEASE VOTE.. JAY