Does the 2003 Chevy Tahoe have a distributor, and if so, where is it located?
My 03 Tahoe has recently started making a tapping noise (described as piston slap from what I understand) only on a cold start. It's only been doing this about a week, and when the engine warms up, it goes away. Ive also noticed some fluctuation in the RPMs around 40-45 mph. I've recently added an aftermarket air intake, but the problems don't appear to be associated. Just had the tranny rebuilt, replaced the MAF, and had the throttle body cleaned. I'm about to replace the fuel filter myself. The engine has 166,XXX miles on it, but I've never had any trouble until recently. Also, I drive like an old man.