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By Silverado EW
I just purchased a 2019 Silverado RST with the 5.3L, 3.42 Axle, Max Trailering Pkg etc to pull my travel trailer. After we picked truck up we went to dinner when we left the restaurant it would not shift out park. I shut it off and restarted a couple of times then just left it run and after a couple of minutes it would finally shift. I could hear the switch engage and the brake lights would come on but I was unable to pull the lever at all to shift from park. It happened three times this weekend so I took it to the dealer on Monday. They looked it over but didn't find anything wrong and said there were no bulletins on this issue.
Anyone else have this experience?
Hi. Vehicle: 1996 GMC K2500 Suburban 7.4 Lt. VIN: 3GKGK26J4TG511185 I need to buy the oxygen sensors and my auto parts store is asking if I have a 4L60-E transmission. Would be grateful if anyone could help me find out the type of automatic transmission in my truck. Based on the VIN, Is it a 4L60-E ? Thank you. Jon
Hello everyone, this is long and appreciate the feedback
So this is the second time that this has happened to me. I do not know what cases this but here's the story.
First instance, i was leaving the dealer after picking up new floor mats (they were not installed, does not matter to what happened). While leaving and making a uturn to hit the street i hit a driveway(to another dealer) and put my foot down halfway (at least 1/4 and i believe 1/2) and nothing was happening. It almost felt like it was in the middle of changing gears but for 2 full seconds by the end of the 2 seconds i was at least 3/4 down on the pedal.
Since this was the first time i did not really think of it and kept going and took note of what happened, thinking that i was over exaggerating.
The second time, i was running through a yellow light and was 100ft away when it turned yellow and was doing roughly 30mph. i got on the throttle to "get through" the light without getting a ticket. nothing happened again till i got at least 1/2 down on the throttle and it took off but at this point i bearly broke the line when the light turned yellow.
So my question is, what does everyone think that happened? I will be going back to the dealer soon for a software update this week, and will let them look the truck over.
would this be a cause of the throttle assembly/TMS(torque management system)?
This may be a rather strange question, but is it possible to reset the learned driving habits? My 2014 GMC Sierra 1500 SLE 4x4 crew cab drove great for the the first year (new to about 10,000 miles). The truck was very responsive and the AFM was not bad then--it only kicked in at about 45 mph or greater and it was not objectionable. After about a year, the AFM started engaging much more aggressively and at lower speeds--the truck would periodically jerk violently when it entered V4 mode. It began trying hard to avoid downshifting, so there is absolutely no power when you turn corners or start up a hill unless you really shove down on the gas pedal. I distinctly remember a coworker saying, "What's wrong with this thing?!?" soon after the clunking and other stuff started. The dealer said it was learning my driving habits and everything was normal. Now, I have 57k miles on the truck and I really do not enjoy driving it anymore. I have about a 25 mile commute with long stretches of 35 mph speed zones. If I don't drive in M5 or activate the Range device, the truck repeatedly goes "CLUNK, lug, SQUEAK!" as the AFM engages, the truck lugs along for a bit, and goes back to V8 mode (with passive exhaust valve squeak, of course). I have noticed the clunking is much worse when the outside temperature is below about 45 degrees. The dealership says I am stuck with this behavior because it has adapted to my low-speed stretches and there is nothing I can do about it. They say most of their similar complaints come from people who drive at lower speeds.
The truck has only been maintained at the dealership--I got tired of them saying I was not maintaining my last truck properly (Mobil-1 changes at 4-5k miles or 45% oil monitor remaining, coolant and transmission flushes at 30-35k, and all fluids replaced at 50k miles, mind you). I have had them do far more maintenance than recommended and I don't hesitate to throw this fact back in their face when they start to say I have done something wrong to cause the bad behavior (they said going too long between oil changes probably caused it until I told them to check their records). They tried pulling the battery and it didn't help anything. I would love to have my truck drive the way it did when it was new. I know I could get a tune, but I have an 84 month, 84K mile warranty and I don't want to risk having too many increments of the flash counter. My dealer says to get a tune when the warranty expires, but I doubt I will keep the truck that long--I honestly don't have much faith that the drive train will hold together. The constant "clunk-lug-squeak!" reminds me of the clown cars you see at a circus. Does anyone know of a way to reset the learned behavior or do I have to live with it until I get rid of the truck? I can get access to SPS if there is a way to resolve this via the dealership tools. Any help would certainly be appreciated!
So I have recently purchased a Range AFM disabler for my 2017 Silverado 1500 E-assist because of the constant stopping and starting at stop lights, exhaust drone from V4, weird shifting from V4 to V8 and my transmission liking to jerk/shifting hard every so often.
After installing the Range device, it has solved my transmission issues, disabled stopping and starting at stop lights, and has been keeping it in V8 mode 24/7! The only thing I have noticed is that when I am decelerating from a speed of around 50 MPH or more, the engine will have a fast repetitive backfiring popping sound until i either get back on the gas pedal or have reached a speed of 35 MPH.
It seems to happen when i am decelerating slowly and not fast, starts to backfire when it starts to downshift at around 900-1100 RPMs
I have a flowmaster Super40 cat-back dual 2.5 inch exhaust with the third "cat" still on. It used to not backfire when the AFM was active BUT when decelerating, it would switch back into V4 mode. is there a way to fix this? Is there too much freeflowing exhaust? Can this backfiring through the exhaust cause any damage if left unfixed?
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