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the only temp issue Im having is my temp gauge now fluctuates, when the truck was new it ran one mark under the 210* line, now it fluctuates between...

Are you having heat issues? Have you completed the purge procedure? What's the reason to replace NAPA stats? A normal drain/fill service doesn't...

Update: Have yet to attempt any remedies, however, I just started engine and observed puffs of smoke out of filler tube. Definitely blow-by coming...

so the low point isnt the bottom radiator hose then....thanks GM....every video/ thread Ive seen guys just let it rip out of the bottom hose... Ive...

The engine and remainder of the system will retain a lot of coolant. The bottom of the block will also retain a lot of coolant. It has drain plugs...

OK. Thanks again. I'll try the MMO.

I suggest following the MMO label instructions. I haven't used it lately, but have no negative experience with it years ago. Sea Foam is another...

I changed out the rubber heater hoses, refilled it with water, to check for leaks. no leaks so I pulled the bottom hose, removed the vent bolt. I...

I agree about a '93 not have such boss. What year would apply? Grandson claims original engine. How much MMO to add to crankcase? Thanks!

Same family since new. Grandpa sold it grandson. Grandson claims engine is original. I drove it from SC to Florida and back towing a trailer with a...

The "Boss" on the drivers side near the balancer ????? This would be the port for the crank position sensor... A 1993 engine should not have...