2007 Tahoe/Issues - engine light

[Geotrash]

So update...hubby takes all his GM work vehicles to local dealer and managed to get my Tahoe scanned on the cheap. Was a cracked sparkplug (outer porcelain) and corroded wire. That's. All. And they did an inspection and washed it to boot Sparkplugs only had about 10k on them (iridium). Husband suspected installation issue maybe? He says purrs like a kitten. He also said that the mechanic has worked on 3rd generation a lot and the lifters on these do not fail as much as the NEW ones.

Wow. Thanks for following up. Someone probably installed fake knock-off plugs from Amazon. Those fakes have killed a lot of engines.

 

[Caligirl]

Wow. Thanks for following up. Someone probably installed fake knock-off plugs from Amazon. Those fakes have killed a lot of engines.

It was at a GM dealer (different one)...sellers had it serviced before they sold (have the invoice), but from what I've read on this forum, those fancy plugs can foul before their time. We suspected it was that- so glad it was just that!

 

[Fless]

These plugs aren't necessarily prone to fouling any more than any other plug types. But the cracked porcelain was probably a manufacturing defect or, more likely, damaged when installed.

 

[donjetman]

most likely damaged when installed .