racerx55

well i got an odd one. 05 Z71 ext cab, L33 motor...i have this strange clicking / snapping sound, it sounds literally like a plug wire arc, but it comes from under the back of the truck. its random, seems to do it when i hit the gas sitting still, or put it in reverse sometimes itll snap twice.i cant describe itany other way than and electical arc snap.ive been crawling under this thing for 2 hours trying to track it down and just can not find it.
ive never noticed it before but its been cold since i got this truck and havent ever had the windows down much.
its loud just like when a plug wire arcs.
is this something i just missed that might be normal or has anyone ever heard a sound like this?
seems like it wants to idle a little rich when it does it also, seems to load up a bit. its not a plug wire, theres me and 3 people that hear it from the back of the truck so dont call me nuts.
and also WTF is that box up under the bed? kinda looks like an ECM....

ActiveMonkey

I might have this problem too. For me it sounds like small wticks breaking. I've checked, and double checked, but can't find anything either...

shawnvw

This sounds exactly what you guys are looking for


#PIP3105D: Ping, Pop, Snap or Click Noise from the Propeller Shaft - keywords accelerate axle differential drive driveline garage gear intermittent noise ping pop prop propshaft rear reverse shift tick - (Nov 18, 2005)
[/align]
[align=left] [/align][align=left]Subject:
Ping, Pop, Snap or Click Noise from the Propeller Shaft [/align][align=left]Models:
1999-2006 Chevrolet Silverado [/align][align=left]1999-2006 GMC Sierra [/align][align=left]
[hr]
[/align][align=left]The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
[/align][align=left]Condition/Concern:
Some customers may comment on a ping, pop or click noise from underneath the rear of the vehicle, when shifting into reverse or drive, or out of reverse into drive or possibly drive to reverse.
[/align][align=left]Recommendation/Instructions:
The noise is originating from inside the propshaft. Please replace the propshaft with the part numbers below.
[/align][align=left]On 1999 - 2006 C1500 C15903 (Reg cab 8' box) trucks equipped with 4L60E (RPO M30) and 3.23 or 3.42 axles (RPOs GU5 or GU6) use propshaft 15189835. This is the propshaft for these trucks built with 3.73 (RPO GT4).
K1500 trucks with 143.5" wheelbase which are K15543 (crew cab 5'9" box) and K15753 (extended cab 6'6" box) used 2 different u-joint sizes. Production change was made on 10/28/2004.
[/align][align=left]On 1999 - early 2005 - K15753/15543 (143.5" wheelbase) with M30 - Use 5" design 15751438 (Smaller U-joint shafts built 1999 through 10/28/2004)
On late 2005 - 2006 K15753/15543 (143.5" wheelbase) with M30 - Use 5" design part 10382035. (U-joint upgrade shafts - Vehicles built after week of 10/28/2004)
[/align][align=left]All 2005 - 2006 K15543 (143.5" wheelbase) with M32 and NP3 - Use 5" design from Silverado SS - 10382033 - All 2005 and future have the big u-joints.
2002 - 2004 K15753 with all wheel steer (RPO - NYS) and NP3 - Use 5" design 10382035
[/align][align=left]Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.[/align][/align]

racerx55

lol gotta love aluminum driveshafts. i hope it breaks and goes through the gas tank and burns it to the ground [sm=badbadbad.gif]
yea or it could sound like cracked aluminum popping back and forth. so is that a recall thats not gonna cost me money or what?

ActiveMonkey

gotta love extended warranties...

ehhget

I believe it is a "silent recall" basically if people dont bitch enough to GM they will let the problem persist and drive the owner nuts like he is hearing things !!!!

ehhget

Hey Shawn where did you get that information from?

shawnvw

It is not a recall, Its only a bulletin to assist techs on diagnosing common problems. If your vehicle is under warranty, then it won't cost money, if you're out of warranty, then sorry but you're paying.....unless you have extended warranty then you just have to pay the deductible

ehhget....that document came from GM's service information website

ehhget

Got a link?

shawnvw

I could give you the link but it would be useless without a username and password