General Motors Tech Chevy tech talk within.

04 silverado 4.8 engine problems

Old 01-16-2011, 05:13 PM
Junior Member
Thread Starter
Join Date: Jan 2011
Posts: 1
Default 04 silverado 4.8 engine problems

I have a problem with my 4.8 that I can't seem to be able to find/fix. It basically loses power and will not rev over 3000 rpm. When you gas it over 3000 it just acts like it is working like crazy. It also gets horrible gas mileage when it is having one of these episodes. I call it an episode because it will do this for a month and then go back to normal for a while and then back to acting up. I have changed the plugs and wires, all of the o2 sensors, and took the guts out of the catalytic covertors. Also on this truck it only has an internal fuel filter in the fuel tank. Oddly enough my cousin has a 04 with a 5.3 and he has the same problem. Has anyone ever had this happen?
Related Topics
Thread Starter
Last Post
Ford F-150 Forum
07-23-2013 03:11 PM
Chevy Silverado/ GMC Sierra Forum
06-10-2010 04:57 PM
General Motors Tech
10-26-2008 08:25 PM
Chevy Silverado/ GMC Sierra Forum
03-28-2007 08:36 PM
Chevy/GMC Small Trucks Forum
01-23-2007 08:13 AM

Thread Tools
Search this Thread
Quick Reply: 04 silverado 4.8 engine problems

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.