Sign up for FREE! Become a GM-Trucks.com Member Today!
In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience.
I have a 2020 gmc sierra sle 5.3, I bought it may 13th. Starting at about 800 miles check engine light would flash for a minute or two and then go off, this occured every 300 miles until I got in one day around 1500 or 1600. Check engine light stayed on. Called the dealership and took it in was throwing misfire codes, the diagnosed it as fuel pump module reset the codes and ordered the part and sent me on my way. Come back in and had it replaced when the part arrived, well now fast forward to a tank and a half later and now the check engine light is on for the evap system/gas cap, and fuel pressure at 2200 miles. Right at a week from the time it come out of the shop. I've been extremely happy with the truck but I can't believe I'm going to have to find time to get it in the shop to be looked at and fixed again. I'm at wits end already. Anyone else having these issues?
Hi there, new to the forum. Looking for information if someone already deal with this problems.
2014 Silverado 5.3
I changed spark plugs, cables, all the injectors.
And after that the truck worked well for 2 days after that I started getting code for misfire cilynder 4, the stabilitrack light, engine power reduce, I know I need to remove the valve cover and check for lifters, but I just want to know if someone already deal with this and what was the fix for this. I like the truck but it just sucks to many issues with this engines.
2007 Silverado 5.3 V8 with AFM with 180,000 miles
Truck had lifter ticking sound and white smoke upon every start up which would go away after a few minutes, no check engine light
Replacement list :
- valve gaskets
- upgraded drivers side valve cover
- valve stem seals
- intake manifold gasket
- exhaust manifold gasket
- 8 new afm lifters
- 8 new non-afm lifters
- head gasket bolts
- engine coolant temperature sensor
- spark plugs
- spark plug wires
- fuel injectors
- water pump
- cam sensor
- crank sensor
After completion of engine reassembly no longer had white smoke upon start up and no ticking sound but flashing check engine light code p0300.
Code p0300 was for cylinder #1, #4, & #7
Moved coil packs between cylinder #1 and #2 to see if coil packs was bad but no change. Set engine at TDC before installing the rocker arms.
All bolts have been properly torque and no parts have been left unplugged or uninstall.
Any possible advice would be helpful
I've got a 2014 GMC Sierra L83 single cab... I recently decided its time I start getting some performance out of my truck.
L86 Thottle body and intake manifold
1 7/8 header + full 3 inch exhaust (magnaflow muffler)
Stage 2 GPI cam kit + DOD Delete
Transmission Oil cooler
I had the car dyno tuned and everything went perfect. We later had a few trial runs on the street and hit issues with sort of a misfire at specific rpms and gears... 2nd gear at 4,200ish rpm it would have a slight nudge and again at 5,200ish another drop and kick. It would happen almost all the time.
We thought it would be the spark plug cables, went and got MSD plug cables added those, tried again, same thing! Spark plugs are new, fuel injectors are serviced with zero issues... the car ran perfectly before we did all of this...
The tuner now tried raising the oil pressure in the transmission thinking its a gear slippage due to the oil pressure. Tried again, same thing!! We've ruled out alot of the problems, now theyre saying that its the disc thats slipping in the transmission which would make sense but I want to get ideas as I'm spending money trying to fix the issues that we're not a 100% sure about. Can you guys let me know if anyone went through anything remotely similar or if you have any views on the matter.
By David Sohn
I had a rough idle ans I noticed my tahoe losing power ans engine started missing. Code acanner said random misfire. Changed plugs, wires, and crankshaft sensor. It started ran finw for about 30 seconds- 1 minute maybe, then it just died instantly. Hasnt started since.
Recently Browsing 0 members
No registered users viewing this page.
Most OnlineNewest Member
Who's Online 17 Members, 0 Anonymous, 911 Guests (See full list)