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LMC Truck

Username Post: 06 2500HD with 6.0 gas multiple misfire        (Topic#348161)
Forum Newbie
Posts: 5
Age: 44
Loc: Texas
Reg: 03-21-15
11-11-17 06:14 PM - Post#2714075    

I have a 06 Silverado 2500HD with the 6.0 gas engine. A couple weeks ago while pulling my camper, it lost power and the check engine light came on. Cylinder 7 had a misfire. The plug wire was loose. I put it back on, cleared the code and continued on my way. Once I got to my destination, I kept getting multiple misfires. I found the plug for cylinder 2 had backed out. I tightened it back up. A loud tick developed as well. I took it to the Chevy dealership. They had the truck for a week and told me the engine is trashed and I needed to replace it. Said cylinder 2 failed compression test. I told them to put it back together and I picked it up. It passed the compression test I did when after I picked it up. I’ve driven it 40 miles since I picked it up and still shows multiple misfires. I’ll be replacing the plugs and plug wires next weekend(it’s parked at my property 200 miles from home). I just wanted to see if there is anything else I need to look for.

To the world you may be just one person; but to one person, you may be the world.

LMC Trucks
Posts: 135

Age: 20
Loc: Dayton Texas
Reg: 02-23-15
11-12-17 04:03 AM - Post#2714107    
    In response to jafred3

Check the plugs on the cam and crankshaft sensors. Mine was loose and they caused a random misfire. Make sure to put di-electric grease in the spark plug wire ends so when you install the wire the di-electric grease will coat the connections. Also check the spark from the coil. Does any other member know what the spark is supposed to look like? is it supposed to be Blue or yellow?

2000 chevy silverado "mutt" RIP
1993 chevy k1500, swapping
everything from "mutt"

"6th Year" Silver Supporting Member
Posts: 3815
Loc: Salt Lake City
Reg: 06-20-09
11-12-17 12:28 PM - Post#2714167    
    In response to Hohnsz71

Spark needs to be blue. Yellow is a cold spark, i.e. low voltage.


'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke

Forum Newbie
Posts: 5
Age: 44
Loc: Texas
Reg: 03-21-15
11-13-17 08:07 PM - Post#2714308    
    In response to CowboyTrukr

Thanks for the help. I really appreciate it.
I’ve driven all 117,000 miles on it and it’s never let me down.

Just to add to my original post, when I dropped it off the service writer started telling me how he likes to use the 6.0 engines in his race cars. Red flag. A couple days later the same guy tells me the engine is trashed and needs to be replaced. Red flag. I would expect to see smoke coming from the exhaust if I had bad rings. It doesn’t smoke at all. Red flag.

To the world you may be just one person; but to one person, you may be the world.

Edited by jafred3 on 11-13-17 09:33 PM. Reason for edit: No reason given.

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