So my 05 ext lt 4wd shut down while at a stop light. The dash read "low oil pressure" as it was shutting down. The oil level is good and It started right back up with no issues after that. Anything I should be looking at specifically? I know that the ignition switches go bad and the spark plug could can also be an issue. However, I'm not showing a check engine light or any codes. Have any of you had any experience with this type of random issue?
Narrowing down an issue
- Thread starter dropmech
- Start date
Mooseman
Moderator
If no noises while running, it's usually the pressure switch located just above the oil filter that's defective. Common issue.
Tiggerr
Member
If your AC was on when it stalled it’s a common GM issue....
There’s quite a few threads about this.
No ones ever figured out why these trucks do this... same with some other GM vehicles...
For whatever reason once in awhile they’ll stall at a light... oil pressure warning comes on as its stalling due to low RPM...
My Rainier does it from time to time usually when it’s real hot out but not always.... so did my wife’s 04 Malibu...
There’s quite a few threads about this.
No ones ever figured out why these trucks do this... same with some other GM vehicles...
For whatever reason once in awhile they’ll stall at a light... oil pressure warning comes on as its stalling due to low RPM...
My Rainier does it from time to time usually when it’s real hot out but not always.... so did my wife’s 04 Malibu...
Mooseman
Moderator
What he said. I misread it as "the oil pressure was low and it shutdown". @Tiggerr is correct. the 4.2 especially on this platform is particularly sensitive to that is the throttle body is dirty.
How to clean your throttle body
How to clean your throttle body
SpeedUp
Member
Thanks for the link on cleaning the TB. sucks that photobucket stuff is all blocked without a subscription
Mooseman
Moderator
Tiggerr
Member
Even with a squeaky clean TB some still occasionally stall at idle in gear with AC on...mine included... for no apparent reason I’ve ever seen....
Cleaning the TB is always a good place to start with these trucks however....
SpeedUp
Member