Surging '17 Z71 5.3??

[kaika]

Aloha All,

 

My 2017 Silverado 1500 Crewcab V8 5.3, with around 3500 miles, and it has been acting a bit different whenever comes to slow down at the intersection. As I depress the brake to slow it down, just right before stopping, there is a push/surge from behind like I am towing a heavy trailer while there is no trailer attached. I have AFM disabled because I don't like the V4 mode. I would like to know if anyone out there has experienced the same thing or similar that can point me in the right direction. Planning on a consult with the dealer during my next scheduled maintenance, but don't want them to look at me like an idiot. Thx much for the advice.

[martha3065]

Aloha All,

 

My 2017 Silverado 1500 Crewcab V8 5.3, with around 3500 miles, and it has been acting a bit different whenever comes to slow down at the intersection. As I depress the brake to slow it down, just right before stopping, there is a push/surge from behind like I am towing a heavy trailer while there is no trailer attached. I have AFM disabled because I don't like the V4 mode. I would like to know if anyone out there has experienced the same thing or similar that can point me in the right direction. Planning on a consult with the dealer during my next scheduled maintenance, but don't want them to look at me like an idiot. Thx much for the advice.

Happen to have the 8 spd? This is common as it shifts to first gear. Doesn't mean it's right. My 2016 does it also. There are other threads on here discussing it.

[Dnt]

I know this is a 5.3 engine thread but I have 2017 6.2 engine that exhibits a weird little boost at light throttle. Feels strange, when you apply light throttle at slow speed the truck surges forward like you mashed down further on the pedal. My 2016 6.2 never ever did this................. I guess I need to study this gas pedal flex thread a bit, that almost makes sense to me that if there is some play (flex) there that it could cause this symptom ......... I am sure my local dealership service department will stamp it "NORMAL" LOL so up to me to investigate.

I do know that both this 17 and the 16 had some hard downshifts at the same downhill grade to a certain redlight in my little town here . This 17 being noticeably worse but it has not been broken in good, at slightly over 1200 miles. I am hoping it gets better. I would hate to have to go buy that Roush F150 that I was looking at the other day!!!!!!!!!!!!!!

[2017_LTZ]

My '17 5.3L with the 8-speed has the same surging feeling but I only notice it after cold starts. Once the truck warms up its smooth as butter. Currently have about 3600 miles on my truck.

 

I thinking about taking it in to the dealer and mentioning the TSB.

[billybob denali]

took back the 2017 1500 Denali w/ 5.3 and 8 speed with only 1200 miles due to the misfire, surge, as described in this thread... dealer is saying its the 8 speed tranny. If I use the +/- button on

the shifter and kick it down to 6th, the surge/misfire will go away... something to do with software on tranny and 5.3L engine.... they "claim" they were surprised this 5.3 was built with the 8 speed... I really could care

less if it has 6 or 8 speed. I just want the misfire and surging under light load to be eliminated/fixed.... dealer says GM is working on a fix.... yea, like when? 1 month or 11 months from now? its a freaking

$63K truck, both the engine and tranny are not THAT new..... they should be able to re-write the software... WTF GM this is totally unacceptable... if I wanted a POS, I would of bought a dodge or ford

[Lancegray911]

I just purchased 2018 GMC Sierra and it hesitates as well . Rpm needle shakes so I know it’s not my imagination . Haven’t taken it back to dealer yet but it appears they’ve yet to fix any year with the issue. I thought it might be the V4-V8 but not so . It’s my first GMC , not impressed so far . I’ve heard talk of taking it out of V-4 but not sure if it’s possible on 2018?

[NEVER AGAIN A GM]

Black Bear Tune is the only way to make your GM truck run the way a truck should run.

GM can not make a truck run better than a Black Bear tune.

http://blackbearperformance.com/

 

[FourThor]

On 12/26/2017 at 5:28 PM, Lancegray911 said:

I just purchased 2018 GMC Sierra and it hesitates as well . Rpm needle shakes so I know it’s not my imagination . Haven’t taken it back to dealer yet but it appears they’ve yet to fix any year with the issue. I thought it might be the V4-V8 but not so . It’s my first GMC , not impressed so far . I’ve heard talk of taking it out of V-4 but not sure if it’s possible on 2018?

A tune or a range afm delete module will get it out of v4. I too have a 2018 with this issue, took it to the dealer, apparently GM knows of the issue but has not released a statement. Said they've seen 40+ trucks come in for the same issue in past few months. Needless to say I'm pretty upset.

[Eric J]

Hello I have a 2018 Gmc sierra 5.3l 6sp with 1900 miles and since 200 miles it started the hesitation around 20 to 28 mph but only until the engine temp is 1/4 way heated up and and down shift clunks hard and late from 2 to 1. But what is really scary is every morning when I put it in reverse for the first 30 feet backing out of my driveway it surges like hell like its a race car with a big cam in it , its unsafe . If the engine is warm its ok but until its a 1/4 way warmed up its a total turd that feels like it has 100k miles . Been in talks with GM and just escalated a claim to look at options on getting out of this truck . GM quality seems really low but thats all im used to driving for the past 15 years. Wife has switched to a 2018 mazda  since the way this Gm has been so far , And if I can I think Ill leave as well since my 2008 silverado with only 68k frame had pretty bad frame rust I mean not just surface, I should have followed my gut not have continued to support GM. Has anyone found a fix? Other then the gas peddle shim ? im not seeing many with 2018's mostly tsb for the 17's  Also not to happy with the body both side the drivers side being worst has ripples all the way down the side of the truck very poor quality Also every turn and acceleration the and drivers sear pops loudly wtf GM 

[Silveradoh]

Hello I have a 2018 Gmc sierra 5.3l 6sp with 1900 miles and since 200 miles it started the hesitation around 20 to 28 mph but only until the engine temp is 1/4 way heated up and and down shift clunks hard and late from 2 to 1. But what is really scary is every morning when I put it in reverse for the first 30 feet backing out of my driveway it surges like hell like its a race car with a big cam in it , its unsafe . If the engine is warm its ok but until its a 1/4 way warmed up its a total turd that feels like it has 100k miles . Been in talks with GM and just escalated a claim to look at options on getting out of this truck . GM quality seems really low but thats all im used to driving for the past 15 years. Wife has switched to a 2018 mazda  since the way this Gm has been so far , And if I can I think Ill leave as well since my 2008 silverado with only 68k frame had pretty bad frame rust I mean not just surface, I should have followed my gut not have continued to support GM. Has anyone found a fix? Other then the gas peddle shim ? im not seeing many with 2018's mostly tsb for the 17's  Also not to happy with the body both side the drivers side being worst has ripples all the way down the side of the truck very poor quality Also every turn and acceleration the and drivers sear pops loudly wtf GM 

As far as the seat goes, there is a TSB for that, got it done last oil change, piece of cake. Good luck with everything, hopefully you can get a fix.


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[prattp]

I Too have a 2018 Silerado 5.3, 6 speed. This is my issue.... On first thing in the morning startup the truck runs fine a with no issues. After sitting in the parking lot at work until 12PM, which is 5 1/2 hours later, on start up the truck, acts like it is skipping, and you can see the rpm needle actually "flutter". Took into the dealer of course they say nothing is wrong and all is fine, I told them to wait and run the truck after sitting for a period of time, the service guy said they did and had 2 others drive the truck and did not see anything wrong with it. Like I told them from the beginning if you mash the peddle you will not feel it, it is when you basically let the truck take off on idle to just touching the gas pedal.  They looked at me like I was crazy, I would like to get this taken care of, it seems a lot of others have the same issue and GM does not want acknowledge it. Any thoughts?

[Eric J]

Well I dropped my truck off at the dealer with the new updated TSB# PIP5504A That has model years 2016-2018 silverado and GMC all vins, L83 Engine and MYC  Transmission . Diagnosing fishbite chuggle misfire feeling or shudder vibration with light tip in. document modified 01/17/2018 doc ID 4944111 . Well my truck was dropped off  10/04/2018 they ran it on the racks for 6 miles 3 mins and duplicated the hesitation that I experience until the engine is 1/4 way warmed up . They then let the truck sit and did nothing until I called them  the following thursday 10/11/2018 they said I need to put more miles on the truck that was at 2300 miles ... They said let the sift adapts learn thats total BS it hesitates like its running out of gas then goes away once its 1/4 way warmed up !!!! Did nothing for the left seat track that has play and pops during stop and go and turns with weight shift said ( gm is aware of the issue and is looking at suppliers)???? And was told (these trucks had no break in period and to drive it like I stole it ) Are you freaking kidding me ???? GM needs to fix this issue or we need to some how start a class action on this issue. When I called the senior rep that I had a case open with to tell her it was duplicated and documented I was told that my case had already been closed wtf!!!! they wont return my calls Ill give it to 5k miles then Im contacting a lemon law attorney .

gmPdf.pdf

[jagabom (Esquire)]

glendon66, just wondering,  did they find something wrong with the Honda?

Jim

CYWG

[Eric J]

Update I have been going back and forth with my dealer and GM about this issue. GM  finally called me back today and said the dealer agreed to do the triple flush as the TSB#pip5504a calls for. I really hope this helps the hesitation, and it's not some bad sensor on the engine because the rep at GM said that if it doesn't then it will just be chalked up as a characteristic of this transmission which is crap. One thing I have noticed is that when the weather was warmer the engine would idle high at first start like normal and slowly idle down . But now here in Ohio it's been around freezing in the am and the truck doesn't start out  high it's more like around 900 rpm and idles down faster which you would think that would be the opposite in colder weather right? And if doesn't seem as intense or a hesitation.....

[Eric J]

Update , yes like said by others my issue is cold engine (set over night or a shift at work) some what lethargic while picking up speed then maintain speed of 25-30, 27 mph the worst 2-3 shift area it would buck- hesitate until 1\4 way warmed up... Have not gotten the trans flush done yet because we had a cold spell here in Ohio teens in the am and 40 degrees in afternoon and the truck had a cold start idle of only around 900 rpm and the hesitation was gone truck was perfect!!!!! ...Normally when it was hot out it would start at 1300 rpm and slowly idle down. Well the last 2 days it's been above 50 degrees out and the hesitation is back until truck is 1\4 way warmed up and the idle is back  up to around 1300 rpm with cold start!!!! Currently have 2,955 miles on the truck ....What the Heck is going on with this truck?