I just picked up a bunch of front end parts today and replacing them tomorrow. I want to also grab a set of ac delco plugs. I've seen a 41-103 iridium on the thread and it is an option according to the parts guy. He also said that he suggested a 41-834 platinum plug and that's what oem calls for. Any suggestions on the difference. A 41-103 is in. Stock and the 41-834 will be in by this weekend. It's a 2005 TB LS with a 4.2. Thanks
Which spark plug for 05 trailblazer.
- Thread starter Rgorman11709
- Start date
Rgorman11709 said:
Don't have the part number offhand, but AcDelco/NGK Iridium plugs should only be used. If you use anything else in a gm engine they tend to run wierd.
Sounds good ill go with the 41-103 iridium ones like I've seen everyone else do. I don't understand why he's saying the computer suggests going with the others.
KNBlazer
Member
- Feb 8, 2012
- 811
41-103 is what the majority here use.... if you can wait on shipping, you can most likely save a few dollars by ordering through rockauto...there's also a 5% discount code available...
if you have never gapped iridiums, youtube has a video, where you use needle nose pliers...
if you have never gapped iridiums, youtube has a video, where you use needle nose pliers...
Rgorman11709 said:
The computer knows that non-iridium plugs can wipe out our coils. The computer also works off of commission, so by cooking your coils, the computer can sell you coils. Brilliant!
In all seriousness, it's the same reason that Autolite offers plugs for our trucks but at the same time the Autolite rep says to never use their plugs in GM COP ignitions...it's all about money. At least the rep was honest.
