TightLines612

Was in my friends truck yesterday with 25k miles on it and his just started making this popping noise when placed in reverse. I'll be sending this to him pronto.

Polarity was switched on the signal from the vehicle to the lights. All fixed.

Having a bit of trouble with a TRS/Morimoto HID install. Had a 2014 Sierra SLT that the following system was being used in: 9006: Morimoto Elite HID System -2 x AMP: Morimoto 3Five DSP -2 x 9006: 3Five 4300K $0.00 -2 x Canbus: 9006 $0.00 System was removed from the 2014 and placed in a 2015 Sierra SLT today. I can't for the life of me get the lights to work. Fuse looks good and after speaking with TRS I hit my ground contacts with sandpaper to remove some paint and ensure a good connection. Any ideas? Did anything change from 2014 - 2015 that would prevent the system above from working? Thanks in advance.

Deleted - wrong thread.

The ticking at idle is a completely different noise. An update after having the lifters replaced. The noise was no where to be found for probably 250 - 300 miles. That had not happened since the noise first started. I was beginning to think the problem had been solved when it gradually came back. The ticking has returned, only in V4, and again, at various speeds. It is not as loud and much more infrequent than before. Truck is currently in the shop because it won't turn over (tried several batteries, and a new starter). We really love the truck when it works as intended but we've had entirely too many serious problems for 12,000 miles. What a damn headache for a $45k truck.

So far, so good. Will do another 500 miles on the truck this weekend and if there are no signs of it then I'm giving it a clean bill of health. Sent from my SAMSUNG-SGH-I317 using Tapatalk

Quick update: Received truck back from dealer this AM after repairs for a "sticking lifter" as the suspected culprit. Too early to tell definitely but so far the truck has been tick free. I'll update next week once it's got some more miles on it. Here's a blurb from the service ticket in case it helps anyone else: "REF DOC ID 4067127 / TAC CASE 71-1478009075 PIP5259D/4138819 REFERENCE LIFTERS MAKING A TAPPING NOISE. PER SPECIAL BULLETIN #15-06-01-002. DOC ID #4213285. AND TAC CASE, REMOVE CYLINDER HEADS, REPLACE ALL LIFTERS, AND FILLED COOLING SYSTEM, AND ROAD TESTED."

Mine happens with or without a load, hot or cold outside, hot or cold engine temp, A/C on and A/C off. Nothing seems to affect it. Again, still waiting on an appointment to address what their mechanic suspects is a sticking lifter (1 1/2 months later).

Nearly a month later and I'm still waiting on parts before they try to fix the "sticking lifter" Anyone else make any headway here?

Had my truck into the dealer today for it's 3rd ride along as the service techs are having trouble hearing the ticking. It's very distinct to my family but perhaps we're tuned into it. I had a recording of the noise and they suggested it could be a sticking lifter. They called GM and they have had this issue before on these trucks and have recommended replacing the lifters. Good news is they think they have a fix, bad news is it seems to be a complicated surgery. I'll be in touch in a few weeks when it's all said and done.

Any theory at this point is appreciated. Let us know how it goes.

Bumping this up in case anyone has found a solution.

Had the truck in for the V4 to V8 chirp. They fixed it with the updated exhaust system and told me it also fixed the ticking. Absolutely didn't change a thing (my wife claims it's worse) so I'll be giving the dealer a call tomorrow.

Al - interesting thought. I'll give it a try when the truck comes back.

I'd be very surprised but I'm not mechanic. Truck is in the shop now for the second time trying to solve the chirp from V4 to V8. Time will tell.