Engine cuts out and bad water temp gauge?

[surferrepoman]

My water temp gauge in my Denali started jumping around between 180 down to 150 and the motor cut out for a brief second each time. I was driving at 70 mph. It happened about 10 times over about five minutes. I stopped checked under the hood, no leaks or anything. Any ideas what the problem could be?

 

[surferrepoman]

Well I finally got around to looking at the Denali today. I replaced the fuel filter, this actually made the problem worse! I almost didn't make it home after driving it a few miles it died a couple of times. So I decided to clean the MAF sensor and the throttle body. The throttle body had enough crap in it I could paint my face black and go hunting! After a bottle of cleaner and letting it dry, I fired it back up and drove it around for about 50 miles and it runs better than new!

Just thought I would post this in case someone else has a similar issue. Now it needs one hell of a bath.