Hi everyone, I'm looking for a water pump for my 55 GMC truck. I've tried AutoZone/Checkers/Advance Auto Parts/NAPA and I've had no luck. Each one of these parts dealers have the truck listed with a different engine size. I believe that the engine is a "235". Anyway, I have a catalog from Chevy Duty but have not had the chance to talk to an actual human being. Any help would be appreciated. Farmerc eng_chief@yahoo.com: