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Okay so I have a 2008 GMC Sierra with 130 on a 5.3. It's my daily driver and now has some issues. Basically a misfire in cylinder 2 that I would like any good help with before I keep trying new things that might not work. So the stalibitrak and traction control lights also flash and are on regularly which started at the same time. Meanwhile the engine light has flashed for a couple seconds but is usually solid. It is a p0302 misfire. So far I have cleaned the MAF, checked for leaks, changed all spark plugs, coils, and wires, ran some seafoam through it at the brake booster line and some in the gastank. I pulled the new spark plug after it didn't work for inspection and it was very carbon fouled after 3 days and very little driving. It runs good at higher speeds but idles rough and loud I would say klunky. Has not stalled. So Does anyone have any ideas before I keep changing things that are not the problem? 2008 Chevy Silverado/ 08 GMC Sierra 5.3
I am sure this has been brought up in other Topics but I cannot seem to find an answer so here it goes... I have a 2007 GMC Sierra SLT CCSB 4x4 5.3L M engine, on Saturday afternoon I disconnected the ground on my battery to add an aftermarket sub and amp tapped off of the Factory Bose amp. After wiring everything up correctly (just running wires) not even installing the amp or subs I decided to reconnect my Battery and fire up the truck... Funny thing is after plugging it back up and going to start it, it immediately said Service Air Bag, and would not start.. I have checked fuses under the hood, under the dash and on the instrument cluster fuse box and all my fuses are good and working! All doors, windows, lights, remote lock, unlock and alarm work but the truck won't start I have tried the 30min key relearn and redisconnecting the battery for 30 min. Normally my truck has a TPMS Service light on due to me having a bad sensor but it isn't even on right now! Everything works but it just won't even crank it just dies in a sense (it acts like it loses power but as soon as I release the key from start position everything comes back (lights up as normal) seems like I am locked out of the system. Scanned with a Snap On code reader with personality keys... I get a B1370, B1011, U0140, P0690 and a airbag code that I don't recall (I'm at work) after clearing the codes only the B1370 and the Airbag code return.The Service Engine soon light isn't even on either I only get these codes with the snap on scanner.. they don't even show up on my basic scanner.. Yes the battery is good also tried jump starting it just in case checked all fuses and relays, starter works with forced relay and key on but will not start also replaced my ignition switch. Another off topic question is what does The TP in the under the hood fuse box diagram mean? it has it near the 41 Fuse it says TP twice then at the bottom it says TP and has like a book with a key next to it... I'm at a loss right now with what the issue is any help is Appreciated!
Hello, I own an 08 GMC Sierra 2500HD Diesel Crew Cab Long box pick up, it's throwing a display message, but not giving me any codes, the message is service trailer brake system, it used to show that message and then I had it brought into the shop the second of July and they replaced the trailer break relay in the rear, had to change out some eye connectors at the fuse box. They also replaced the fuse. Worked great again from then to about a three weeks ago and this was including an 11 000km trip towing the trailer, it brought the message up again. The truck had been sitting and driven every once and a while, a bit of idling this winter as well, but no towing. so I replaced the fuse because it looked blown. After replaced it work fine again no more message thought maybe wet weather caused it. Now unfortunately now again yesterday I went to use it again and the message comes up, it was just recently used a few days ago and no message, today we have some dense fog as well as some rain. I think it only happens when it rains heavy or fog.. I am not entirely sure on that though. I replaced the fuse in the fuse box for the (ITBC) The one I changed out before to get it to work, and this time it did not work and nothing changed on the dash message still up. I can more than easily replace the Relay without any issues, but I don't want to do that if it is just going to create the exact same issue. Any ideas on what might be causing this? Also on a side note, whenever I start the truck it puts out grey smoke until it has warmed up passed about 79-85 degrees Celcius (174F-187F), which is normally after driving for about 5 mins 10 at most or letting it high idle until that temp, it also does smoke when driving until warmed up. it never puts out black or blue smoke. Its grey, just as it is on a cold day in a gas engine. today we've reached the highest temp lately about 8 degrees Celcius and it still smoked. It never did this in the summer or fall just after it got cold. So I am just wondering if this is normal or if something is causing this to happen when it shouldn't be. Could it be something as simple as it needing an oil change? Or also does it need a long drive at highway speed to deal with burn cleaning the DPF? I am a new owner to this pickup, and it is my first year with it so I am new to diesel's and don't know what to expect from them. Any help Is much appreciated!