The 5.3 engine in my 2003 GMC Yukon, idles very rough with the rpm's loping between 400-1000. Seems to be worse when damp or wet outside. Idles so rough at times, the engine dies. No codes, no check engine light, no warnings. Any ideas?
have the same problem?
Wednesday, September 19th, 2012 AT 8:11 PM