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Thanks guys, I appreciate the help. I'm anxious to try some of these methods. The idea of taping off the plastic flares sounds like a very good idea. On a black truck with black flares, the wax residue sticks out and detracts from an other wise pretty clean truck.

I have a 2004 GMC 2500HD with the factory wheel flares and the previous owner got wax or polish on them and my qouestion is what have you found that gets the wax out of the textured plastic? I have tried several products with minimal success. Mothers "Back to Black" does a nice job on the areas...

I installed a Nelson tune and a 180 degree themostat in my 8.1 today. The motor definately responds to the throttle better and revs much quicker. I have not had a chance to check for a mileage increase, but I hope that it will improve some. I normally receive about 14-14.5 on the open highway at...

No, I cannot say that I noticed any change with the plug switch and gap at .045.

I have done the .045 AC plug change and plan to do the 180 degree thermostat swap and I also plan to add a Gibson catback exhaust. I appreciate the posts with your advice and thoughts on the 8.1. I agree, the torque management appears to hurt the performance of these 8.1 powered trucks and a...

What are you 8.1 owners doing for a tune on a basically stock 2500HD ecsb. I would like to hear what you have been using and how much of an improvement you experienced. I have been looking at getting one of the custom tunes over a hand held.

Thanks for the nice welcome to the site. I really enjoy reading the various posts in the different sections. I have learned a wealth of information that will help me with my GMC 2500HD ECSB with a 8.1 / Allison.

I just found this excellent truck site and spent hours yesterday going through the posts. I am impressed with the knowledge and information available here. I own a 2004 GMC 2500hd 4x4 sbec with a 8.1 / allison combo and love it. I pull a 24' Storm enclosed trailer so I watch any posts...