Search Results for ‘lb7’

i got a 2003 LB7 that needed injectors it was filling up my oil with diesel. So got injectors changed and return lines changed. Put everything back together and truck only cranks for like maybe 4 seconds and it stop cranking even with me having key in crank position. Got a scan on it to read...

I have a 03 dmax federal lb7 I replaced the HG and 1 new injector because I broke the terminal. In the beginning 2 injectors were reading balance rates of +15 while the rest were reading -7 I continued to drive it because I was running injector cleaner threw it and at the time the rates clears...

03 lb7 196k miles. I’ve owned since 187k. Previous owner said to have done injectors around 100k. Haven't noticed any oil spots on the ground when parked. Looks to be an older leak but not sure. Any help appreciated. Photo is Passenger side.

I have a 2003 LB7 duramax completely stock. I bought it how it sits thinking I had the solution to fix the problem and my solution did not work out. So I traded this guy my car for the duramax I went over to look at the truck knowing it wasn’t running. We threw a battery charger on it and it...

I have a 2004 LB7 GMC that is getting what I average to be about 4mpg (120miles on a full tank) I bought this truck with a lift already on it, so I don't know exactly how high it is, but it is barely clearing 37s and has an aftermarket front bumper. I know these all hurt milage, but I never...

Going to explain in detail to what I did the best I can. I'm no mechanic but can take things apart and put it back together so that's a plus right? Have a 2001 Chevy 2500HD with a LB7 6.6 Motor. The motor that was in the truck had a bad head gasket and an extreme amount of blow by. So I bought...

Truck will not go into any gear, just thumps really hard and rolls a few inches either direction. Mechanic shows code of P0562, TCM low voltage. I've exhausted all my internet research down to batteries, ignition switch, wiring short between TCM and trans, or TCM failure. I replaced ignition...

I just had my 3rd starter in 4 weeks break, wtf? After replacing it the second time I check the bolts for tightness daily and they are tight. I've never seen a starter break off and the part of the housing that is bolted is still attached to motor. Until now that is. And idea why these keep...

I am not a mechanic and I am probably way over my head! My son purchased a 2003 LB7 truck with 95,000 original miles. It runs rough at idle and has excessive blow by. The mechanic is recommending a used engine swap with a 176,000 mile LKQ motor instead of fixing this one. His reasoning is...

I’m a proud owner of an ‘04 ccsb lb7 with a zf6. My problem is the poor thing needs either a rebuild or new owner. I put 127 miles on it last year, mostly plowing snow. It’s a fairly solid truck with minimal rust and decent interior. It for certain needs head gaskets and injectors. And while I’m...

I have read a bunch of no-start posts and am struggling a bit truck ran and started fine then sat for 4 days and would not start fuel 1/2 tank Pressurized tank could not see leak Cranks without problem I primed got air out of bleeder screw, then primed till hard, went to start and lost prime...

help my 02 5spd allison will only roll forward a couple feet then stops. Almost like it goes into park . Reverse works fine . Trans went out is when it first started . Still doing it after trans rebuil ?????

My 01 3500 LB7 will go into limp mode when towing. It has to be sort of a long hill. I need about 10 seconds up hill with at least an empty gooseneck trailer. I did catch a code months back, P0234 overboost. But it rarely throws a code when it goes into limp mode. I finally got a pillar...

Have change ny fuel presure regulator on fuel pump and now the engine wont start eny one have a god idea LB7 engine thanks in advance Jorn Hansen

Ok guys so i just got this 01 LB7, she’s a 4x4 extended cab truck in great shape. And under 200k miles! My only problem so far is this weird idle surge. Sometimes it happens sometimes it doesn’t, sometimes it’s only in drive at idle and not in park and sometimes the opposite. I replaced the FPR...

Can I just change 1 injector by.just pulling upper valve cover? Also wouldn't a balance Rate check show me which body is cracked by a very high balance apart other 7. So pissed off these Bosch remains from Pensacola Diesel and they don't even have 15 to 20k on them and they won't warranty. He...

I tried priming with the screw and it didn't help need this truck for work anyway I can get it back soon?

I’m looking at a 2006 LB7 duramax to throw in my 1958 Apache. The engines $950 cash, what are things I should look for when I go to see it.

We have a babied pure stock 2003 2500HD with 84k miles. We are on a year long trip towing our travel trailer. The trailer plus all our gear is approx. 7000 lbs. We have new Bosch injectors, all new filters and all fluids are synthetic. We went over our first small pass and found the truck...

Hello, ive been working on getting a 3/4 or 1 ton truck for towing for a little bit know and have recently been offered a trade for a LB7 powered 01 2500HD with 190K Miles. Im asking forums for help as im a gas mechanic, never worked with a diesel. Up until know I was just waiting on a good deal...