1999 chev Suburban overheats

DJDREECE

MEMBER
1999 CHEVROLET SUBURBAN
140,000 MILES

Mileage is in km
The vehicle was imported into Namibia by the namibian government.
all documentation states that it is a 1997 model, but according to the vin number (3GNGK16F7XG253498) I'm told it is a 1999 model?
I have recently had the the turbo replaced, black smoke out exhaust is much better, but vehicle overheats when towing or going uphill - basically, whenever vehicle is placed under strain.
PLEASE HELP!

Will make donation if answer helps. I promise.

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Black smoke indicates too rich of mixture-The transmission could be slipping have it checked out-let me know

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Monday, April 9th, 2012 AT 9:09 PM

DJDREECE

MEMBER
3 POSTS

Thnks for speedy reply, black smoke is fine since turbo replaced.
My major problem is the overheating. What should I be looking for?
It's as if the vehicle has more power on somedays and out of the blue it will feel sluggish?

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Monday, April 9th, 2012 AT 9:13 PM

RASMATAZ

MECHANIC
75,992 POSTS

Is the check engine light coming On? Also might want to check the exhaust for restriction and also the fuel pressure

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Monday, April 9th, 2012 AT 10:59 PM

DJDREECE

MEMBER
3 POSTS

One thing I have not mentioned is that I have a diesel automatic model.
Engine light comes on sometimes. Then goes off by itself.
I am having injectors replaced with marine grade injectors in the next 2 weeks.
Sometimes the car feels sluggish, and other times not. Basically, the hotter it gets, the more sluggish it becomes.
Is it time for a compression test?

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Monday, April 16th, 2012 AT 1:47 PM