What kind of acceleration does a Silverado Sierra have?
Durring light acceleration and at low speeds (city driving 35 mph or so) the truck seeems to run fine. However, when accelerating to highway speeds you notice that the truck will intermitantly jerk. In addition when crusing at highway speeds it runs fine, but anytime you have to lightly accelerate up a hill or something it starts again.
Why does my GMC Sierra stall at 30 mph?
Never threw a service engine light or a code and would readily re start. 2 weeks ago it quit at 30 mph, wouldn’t restart and SES lit up. Code indicated crank positioning sensor. Had it replaced and so far so good. If yours behaves as mine did it could be a while before you get a traceable code. I own a 1998 GM Sierra 5.7L 2wd automatic.
Why does my Silverado Sierra jerk at high speeds?
If you hammer it down, the truck smooths out. It appears to only happen durring light acceleration and at higher speeds. The best I can do to explain the jerking is that it feels as if is missing or being starved for fuel and about to run out. There are no check engine lights on in the truck.
What was the problem with my GMC Sierra?
August 2007, Brought truck into dealership and they figured it was a weak fuel pump and was replaced, September 2007 stalling of engine continued. NOV. 2007 dealership replaced ignition harness, and stalling continued. Dec. 2007 I replaced the battery and did a thourough cleaning of the battery terminals.
What causes a GMC Sierra 1500 to lean?
The only other thing that will cause a lean condition is low fuel pressure. A vacuum leak will be problematic at idle and go away with higher rpms. Low fuel pressure will get much worse at higher rpms. 123 people found this helpful.
Why does my GMC Sierra 1500 run rough at idle?
The spray smoothing out the rough rpm is an indication of the engine running lean, could be low fuel pressure, could be a vacuum leak. With it running rough at an idle and smoothing out at a higher rpm is a general sign of a vacuum leak.
What happens when the diaphragm is ruptured on a GMC Sierra?
If the diaphragm has ruptured it will literally be like putting a hose with fuel into the intake and running it full. When it initially started to go it probably slowly flooded the engine to where it seemed to run ok but the excess fuel created a ton of carbon coating the O2 sensor. Since no air could pass through it, it gave a false lean reading.
What should fuel pressure be in a GMC Sierra 1500?
I assume there really is no way of testing the the regulator itself considering it’s incorporation. 38 people found this helpful. The test is: 12-15 psi when the key is turned on and the pump will shut off within 3-5 seconds and the fuel pressure should drop to 12-13 psi. 11 being the bare minimum and 13 the Max.
What are the RPMs of a Silverado truck?
alkaspeltzar wrote: Hey guys, my 2010 5.3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. It seems to happen primarily when traveling between 45-55mph. When driving, slightly accerating, the truck is doing about 1100 rpm in its 6th gear. The engines RPMs seem to bounce back and forth 50-100 rpm.
Is the GMC Sierra 1500 a good car?
The Sierra has been a good choice for years, and the redesigned 2014 version is an even better performer. With this overhaul, the model landed some solid punches in the ongoing pickup wars. Handling is more carlike than in most others and the cabin is as quiet as a luxury car’s.
What’s the problem with my GMC Sierra 1500?
“Condenser cracked at mounting bracket leaking refrigerant. This is a known issue with many 2014-19 GM vehicles using the same part. Parts were not available anyplace except third party vendors that the dealership would not use because the repairs were to be done under my extended warranty.
Is the 2014 GMC Sierra using the same part?
This is a known issue with many 2014-19 GM vehicles using the same part. Parts were not available anyplace except third party vendors that the dealership would not use because the repairs were to be done under my extended warranty. I complained to the Dealership, GM, and the WA Insurance commissioner.
What kind of acceleration does a GMC Sierra have?
Alright I’m going to do the best I can to try and describe what is going on. I have a 2005 GMC Sierra with the 5.3L H.O. 139K. The truck starts and idles without an issue. Durring light acceleration and at low speeds (city driving 35 mph or so) the truck seeems to run fine.