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Long time lurker who finally created an account. Y'all have been a wealth of info and I really appreciate it.
I have a 2001 Tahoe LT Autoride with the 5.3. My father-in-law bought it new and I bought it from him when he upgraded to a 2019 Tahoe Premier. I've been going through the Tahoe since buying it from him. It was always maintained at the dealer and serviced at every interval.
The issue I am having now is a hard start when cold. It takes at least 2 cranks to get it started in the morning or after a long period of not driving.
I have searched the forums and found some help but no threads with results. Here is what I have done so far to remedy the issue.
-New fuel filter
-New fuel pump
-Techron in tank (one bottle so far)
I have a new fuel pressure regulator coming and will swap that next but the telltale signs of failure aren't there (gas leaking through vacuum line).
The truck had one other issue that has since been fixed. It would overheat (on the gauge) on hot days mainly at low speeds and belch coolant when turned off. I ended up replacing the fan clutch, coolant temp sensor, expansion tank, thermostat, and expansion tank cap.
Any advice would be hugely appreciated!
1997 5.7 Vortec intermittent slow start revisited.
I have a 1997 Express with a 5.7 Vortec and the CSFI system. It has 130k miles.
It is hard to start after sitting. If I pulse each of the fuel injectors with an injector tester then it starts right up. Problem description is mostly in next post. The test procedure that makes it start is in the third post.
I have a 02 Silverado with the 5.3 vortex engine. It will start and die in a couple of seconds. I have tried the relearn process and also the pass lock bypass but nothing seems to help. The security light was one all the time when I got the truck, but now after doing the relearn and bypass it only comes on when I open the door and goes out when I shut it. I don't know what to do from this point. Any help would be greatly appreciated.
By Junior Truck
So I have a 2106 3.6 Colorado. She's been flawless for 65,000 miles. Now I have two issues that I hope are related. With the absence of codes I'm looking for anyone who may have had a similar experience. After refueling when the tank is real low (reserve light on) she cold cranks for several ignition switch cycles before starting. This ECM has not thrown a code to date. No CEL. This only happens after refueling when the tank was really low. Kinda scary 500 miles from home. Maybe a stuck evap solenoid? About the same time this started, I started to get a low idle stumble after running at interstate speed. The low idle stumble is also intermittent. Again no codes. Was just bragging to a Ford guy about how reliable my Colorado and my Duramax have been, then this! Anyone have anything on this?
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