Category Archive: Chevy / Tahoe

Chevy Tahoe Rear A/C

Car Information:
Chevy Tahoe
Year: 1998
Engine Size: 5.7
Trans: Automatic

Issue / Question:
I have a/c system with rear a/c. What is the correct amount of freon for this vehicle with rear a/c? I have been told 3 different amounts from the local GM dealers!

Answer:
Because there was different configurations for the location of the rear evaporators on this truck there is no set in stone recommendation,
I suggest charging up to 250 PSI on the high side at normal operating temps. I would expect it to hold around 3 lbs of refrigerant but you will need to look at the pressures.

For professional auto repair & services in Orlando you can call our shop today at 407-629-2661.

Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447

Engine Noise

Car Information:
Chevy Tahoe 4×4
Year: 2000
Engine Size: 5.3 V8
Trans: Automatic

Issue / Question:
Hello, my question concerns an engine noise that started @ about 95k miles. Oil & filter have been replaced religiously every 3k miles. To say that the truck has been babied is a understatement. It has never towed anything & most of the mileage is hwy. According to the internet the noise on cold start is most likely “piston slap” it goes away after a minute at idle. My question is would an oil additive help and if so what would you recommend? I enjoy your radio show & find it interesting that you worked for new car dealers. I was a Chevrolet dealer service manager for 37 years in New Jersey. Your show is very informative, I could only wish that I could have had a tech like you in my shop. Perhaps I would still be there. Keep up the good work!

Answer:
Thanks for the compliment! Your right the noise may be those darn
short skirt pistons! If the noise goes away quickly its most likely pistons. It never hurts anything doesn’t cause any problems just noisy. Never seen this condition shorten engine life only causes e-mails like this one where consumers complain about the noise.
Thanks for listening.

For professional auto repair & services in Orlando you can call our shop today at 407-629-2661.


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