Excessive white smoke at idle on 2003 chev 3500hd duramax

SOURCE: 4L80E Diesel Transmission Replacement

the gas tranny should work. gm was pretty good about keeping the same bolt pattern.

SOURCE: Having issues with my 1986 Ford 250 Diesel blowing

IF YOUR TRUCK IS BLOWING WHITE SMOKE THAT IS A GOOD SIGN THAT YOU HAVE AN INJECTOR ISSUE, WHAT I WOULD DO IS TAKE TO A REPAIR SHOP AND HAVE THEM TEST EACH ONE TO FIND THE ONE OR INJECTORS GIVVING YOU AN ISSUE. GOOD LUCK HOPE IT HELPS

SOURCE: Excessive black exhaust on 2003 GMC Sierra Duramax Diesel.

This is what i would try (cheapest first) redexe/wyyns
injector cleaner,double dose,then i have put 1gal gas in 10gal diesel to increase burn temp (you may encounter a hot start problem temporarilly)then if still smoking, get a compresion check on the engine(this will tell you volumes)
by the way the NATO tanks put in 1/3 gas in diesel to stop it freezing in arctic conditions.any more than 1/3 can result in problems.

SOURCE: My 2003 Chev 2500 Duramax

check for bad modulator valve on transmission,when bad they cause the engine to smoke greyish or sometimes blueish smoke

Anthony Zullo

• 36 Answers
• Posted on Jan 21, 2011

SOURCE: my duramax sits and idles for about 2 min then i

are you loosing coolant, posible injector sleeves leaking coolant into cylinders after shut down