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2003 lb7

  1. Aftermarket Mods.
    I need help I sprayed some on the rubberized coating shit on my frame near the weel wells, went for a ride come back and there's a good amount of overspray on the panel between the rear bumper and tires so I wiped it off comes right off like thin rubber not stuck to paint or anything. Long story...
  2. General Discussion
    I drive an 03 Sierra LB7 and have some general questions as it's my first diesel truck. I've upgraded it in case I need to do any towing (travel trailer, etc). I've made the following upgrades: Switched the stock intercooler to an all aluminum one, shift kit for tranny, S&B intake, 5" turbo-back...
  3. Aftermarket Mods.
    On my 2003 Chevy duramax I wired up my monitor and plugged it into my OBD2 and the hdmi on the back and it turned on when I didn’t even have my key in the ignition and it won’t turn off unless I unplug it does any one have this problem?
  4. 01-04.5 LB7 Duramax Powertrain
    I just recently bought my first Duramax a 2003 LB7 with 245K miles, I knowingly bought it with bad injectors as that's one of the weak points and I had a well known diesel shop install Some Bosh reman injectors and fuel lines as well as a fass fuel pump/sump and fuel bowl delete. It hasn't...
  5. Gauges, Electronics and Wiring.
    I have a 2003 LB7 I bought completely stock from the original owner with 130,000 miles. I put a 6” lift on with 35s and shortly after this I notice issues with the fuel gauge. When I fill it up the needle never gets completely to full. I also run out of fuel and the gauge indicates I have 1/4...
  6. 01-04.5 LB7 Duramax Powertrain
    In the process of changing injectors when I noticed 2 of them had metal shavings where the fuel lines attach. One was so clogged it couldn't have been working. Any suggestions what might cause the problem? What would I need to replace.