How to video showing step by step replacement of a thermostat as a possible cause for an OBDII P0128 code on a 2004 Chevy Trailblazer with 4.2L Vortec 4200 engine, also referred to as the GM 4.2L LL8 I6 which is found in the following vehicles –
2002–2009 GMC Envoy, Envoy XL, and Envoy XUV
2002–2009 Chevrolet TrailBlazer and TrailBlazer EXT
2002–2004 Oldsmobile Bravada
2004–2007 Buick Rainier
2003–2008 Isuzu Ascender
2005–2009 Saab 9-7X 4.2i
){kind=link}
If this video helped please let me know in the comments, Also Hit the Like Button & Subscribe! Thank you for watching!!!
I have had the misfortune of having to do this job more than once. As a refresher I pulled up this video and it is by far the best one I have seen on this topic. The tip on how to get the bottom alternator bolt was especially priceless and I agree having the battery out of the way greatly simplified this operation . Thanks for such a great video!
Thanks for the tutorial. The way you show and explain the process makes it easier for me to replace the thermostat on my own saving lots of cash I can't afford. Once I check that I have the proper tools I will go to work on it. Hopefully I will find this video again and be able to let you and your viewers how it went for me.
Thank you so much for posting this instructional video! I'm a divorced mum with kids and you just saved me $$! Also this video is great for folks needing to replace their Chevy trailblazer alternator. #ChevyTrailblazerAlternatorReplacement #ChevyTrailblazerThermastatReplacement
Why didnt you just go in through the left wheel well?
Why all that work to leave the old hose on
Carquest thermostat still going?
I like to let out as much coolant as possible in order to get some new coolant in it.