Remember The Afm Lifter Thread ?

[98 Z71 SLT]

Well, at the dealership, we have had our 3rd case of failing AFM lifters. Remarkably, 2 out of 3 cases have been with NEW, brand spankin' new trucks!! Unbelievable.

 

Makes you think...when they road test these AFTER production...don't they listen to ANYTHING ??

 

Every car and truck we get has at least 2 miles on the odometer.

 

Anyhow, here we go on an update.

 

2008 Sierra 1500 Crew, 5.3, was dealer-traded to another GMC Store in the area. Do not know what happened to the truck...but I personally heard that engine ticking for at least 4-6 minutes. Not piston slap...but definite lifter tick.

 

2007 NBS Sierra 1500, 5.3, customer vehicle, around 9,000 miles. AFM lifters were REPLACED on a Saturday, about 4 weeks ago. Remember, cylinder heads must be removed to get access to the lifters.

 

YESTERDAY, about 10 am, the new-vehicle delivery truck rolled thru the lot. Dropped off a bunch of Yukons, and one Sierra. I requested to do the PDI on the Sierra (pre-delivery inspection). I pulled the

truck into the shop around 4 pm. But, after pdi, I put about 4 miles on it...and this engine was CONSTANTLY ticking, no matter how I drove it. Oil level is perfect, idle is perfect, but it just has one lifter making a lot of noise. Obnoxiously loud? No. Noticable? Yes.

I have to add...I dodn't get to listen to the engine ice-cold when pulling it into the shop...the lot-boys had the radio blasting...and I really wasn't concentrating on listening to a lifter tick-noise.

But, the test drive, and hearing that lifter ticking-kinda worried me.

 

There are some cases out there fellas---don't "put-it-off" if you notice something on your pickups...

[dannyg2006]

Maybe I should get mine checked out then...

[tobias]

Okay, before this gets out of hand...

 

Hopefully this'll keep the trolls away!

 

 

I hope this stuff works.

[98 Z71 SLT]

Okay, before this gets out of hand...

 

 

I hope this stuff works.

 

What's this supposed to mean? I'm purely giving an update to a known deficiency in some of our trucks .

[tobias]

Okay, before this gets out of hand...

 

 

I hope this stuff works.

 

What's this supposed to mean? I'm purely giving an update to a known deficiency in some of our trucks .

 

 

I have AFM also so I am very interested in this thread. I was not implying you were a troll, simply making a joke about spreading a little Troll-B-Gone before the few Toyo fans we have on this site find their way here and begin their barrage.

 

EDIT: Check the other post now, is it clearer, the meaning?

[sno]

Wish you were a tech around here!

 

Took my wife's Suburban in a couple of weeks ago to have some things checked. Of course, after they had the thing 3 days, I got the "could not duplicate" BS on all 3 issues.

 

1) Lifter noise when engine is 'cold'.

After I refused to accept the service writer's initial BS about piston slap, he told me that it was an oil issue and "it takes a couple of minutes for the oil to get pumping". Since I didn't buy that either, he said they'd have a tech check it out. Of course the tech heard nothing wrong.

 

Sad thing is that when the brought the SUV back around to me, it was knocking. I shut it off and told the service writer what it was doing. So he went off to get the tech so he could hear it knock. After about 5 minutes, the guy came back and said he couldn't find the tech but would go with me to hear it himself. But, by then, the engine had been heat-soaked from the initial run time and it wasn't knocking loud enough to hear unless you knew what to listen for and this paper-pusher sure didn't know. It didn't help that their shop was the noisiest place in town with all the radios blaring, paging system announcements, and the big-rig trucks idling at PTO speed to pump lubricants into/out of their bulk containers. I figure I'll just let it go until it blows up. GM can eat a much bigger bill because of their agents stupidity.

 

2) Both front shocks are leaking.

Was told this was "normal seepage". Guess this is a GM thing as none of my Fords or any aftermarket shock I've ever owned has ever had any kind of 'seepage'.

 

3) All dash & radio lights will go out intermittantly.

Intermittant electrical problems are the worst to find, so I wasn't expecting much on this.

[98 Z71 SLT]

Any owners with ANY type of lifter noise/concern will need this info:

 

PIP4344

 

GM document 2065710

[98 Z71 SLT]

 

 

. I figure I'll just let it go until it blows up. GM can eat a much bigger bill because of their agents stupidity.

 

NO!! As a GM owner, under FACTORY WARRANTY, and...GM has ISSUED A TSB on this condition...go to another dealer, and get those lifters replaced!!!

 

That's the point of this...DON'T PUT IT OFF !!!

[cerbomark]

call GM customer service and make your complaint. They will address it. 1-800-222-1020 or 1-866-790-5600.

[redvett]

Well, at the dealership, we have had our 3rd case of failing AFM lifters. Remarkably, 2 out of 3 cases have been with NEW, brand spankin' new trucks!! Unbelievable.

 

Makes you think...when they road test these AFTER production...don't they listen to ANYTHING ??

 

Every car and truck we get has at least 2 miles on the odometer.

 

Anyhow, here we go on an update.

 

2008 Sierra 1500 Crew, 5.3, was dealer-traded to another GMC Store in the area. Do not know what happened to the truck...but I personally heard that engine ticking for at least 4-6 minutes. Not piston slap...but definite lifter tick.

 

2007 NBS Sierra 1500, 5.3, customer vehicle, around 9,000 miles. AFM lifters were REPLACED on a Saturday, about 4 weeks ago. Remember, cylinder heads must be removed to get access to the lifters.

 

YESTERDAY, about 10 am, the new-vehicle delivery truck rolled thru the lot. Dropped off a bunch of Yukons, and one Sierra. I requested to do the PDI on the Sierra (pre-delivery inspection). I pulled the

truck into the shop around 4 pm. But, after pdi, I put about 4 miles on it...and this engine was CONSTANTLY ticking, no matter how I drove it. Oil level is perfect, idle is perfect, but it just has one lifter making a lot of noise. Obnoxiously loud? No. Noticable? Yes.

I have to add...I dodn't get to listen to the engine ice-cold when pulling it into the shop...the lot-boys had the radio blasting...and I really wasn't concentrating on listening to a lifter tick-noise.

But, the test drive, and hearing that lifter ticking-kinda worried me.

 

There are some cases out there fellas---don't "put-it-off" if you notice something on your pickups...

 

All new vehicles go through the Dynamic Vehicle Test at the plant for maybe 1 mile and the rest of the mileage is moving around the plant and loading & unloading. In a noisy assembly plant you couldn't hear a tick if you wanted to. Modern engines are not hot tested anymore so if the sensors at the balance job don't hear the noise its not going to be fixed. This noise is obviously a problem and engineering is working on it. Even a solution a week ago wouldn't see the production vehicles for months. I guess the Techs will just have to replace them until the fix is at the engine plant.