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Chicago Bob in IA 10-29-2009 11:29:35 67.55.195.163 455690 Report to Moderator	Neighbors truck temp.guage goes back and forth from hot to cold 3 or 4 times in 10 miles. Replaced thermostat, cleaned radiator, checked fan belt, no water in oil or oil or bubbles in coolent. The only other thing I can think of is a bad gauge. Anyone have an opinion? [Reply]   [Send Email]
Hobo,NC 10-30-2009 05:21:01 98.16.15.68 455777 Report to Moderator	Re: OT Chevy 1/2 ton gas overheats in reply to twopop, 10-29-2009 11:29:35   Chicago Bob in IA said: (quoted from post at 19:29:35 10/29/09) Neighbors truck temp.guage goes back and forth from hot to cold 3 or 4 times in 10 miles. Replaced thermostat, cleaned radiator, checked fan belt, no water in oil or oil or bubbles in coolent. The only other thing I can think of is a bad gauge. Anyone have an opinion? Till you provide more info all you are gonna get is a guess,,, at this time I would believe the gauge till I proved it wrong. Year, model, engine size, vin (first 10 of the vin), type of gauge, previous repairs preformed. On Most chebbys its not hard to install a manual gauge,,, $15 nanners and you have a proven indicator of whats going on are whats not going on   [Reply]   [No Email]
MarkB_MI 10-30-2009 03:28:00 32.178.157.168 455772 Report to Moderator	Re: OT Chevy 1/2 ton gas overheats in reply to Chicago Bob in IA, 10-29-2009 11:29:35   First pressure test for a blown head gasket. Second, aftermarket thermostats are notorious for being bad out of the box. Bad gauges are a known problem with certain GM years, mostly around 2004. But the problem generally affects the whole cluster, not just one gauge.   [Reply]   [No Email]
Keith Williams 10-29-2009 15:44:33 72.251.34.78 455717 Report to Moderator	Re: OT Chevy 1/2 ton gas overheats in reply to Chicago Bob in IA, 10-29-2009 11:29:35   I have see the fan clutch go bad and cause people all kinds of problems. Just another thing to look at. Keith   [Reply]   [Send Email]
gary in neb. 10-29-2009 13:09:20 24.116.17.253 455698 Report to Moderator	Re: OT Chevy 1/2 ton gas overheats in reply to Chicago Bob in IA, 10-29-2009 11:29:35   what size radiator and where is the temp sensor loacted? a 4 core radiator with the temp sensor at the back of the left hand head will show alot of temp changes due to the fact that when the thermostat opens, the 4 core dumps in alot of cold water. takes some time to warm it all up, and the sensor reflects that till it balances out. mine has done that for years, and i have replaced motors, raditors, etc, not for that reason, but because the ones i had either went bad, or a deer ran into it(radiator that is). i noticed it more in cool/cold weather. just a thought.   [Reply]   [Send Email]
Stoopid 10-29-2009 12:57:52 74.37.96.21 455697 Report to Moderator	Re: OT Chevy 1/2 ton gas overheats in reply to Chicago Bob in IA, 10-29-2009 11:29:35   Might be the lower hose collapsing and then not. If it's missing that spring inside, it's a possibility.   [Reply]   [No Email]