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fix that car, GMC Mechanic
Category: GM
Satisfied Customers: 493
Experience:  working on all makes of GMC cars and trucks for over 15 years
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99 gmc: 5.3 vortek has developed an nasty oil leak coming..oil pan

Customer Question

have 99 gmc 5.3 vortek has developed an nasty oil leak coming from looks like back of the motor above the oil pan
Submitted: 4 years ago.
Category: GM
Customer: replied 4 years ago.
I cant see the rear very well it looks like it coming frome somewere on the drivers side itook the ko out on the bell housing to look for oil there didnt see any
Expert:  fix that car replied 4 years ago.
is the flywheel oily on the engine side?
Customer: replied 4 years ago.
didnt seem to be
Expert:  fix that car replied 4 years ago.

ok. Lets look ate the oil pressure switch, if it is leaking it will run down the block on the drivers side. here is a diagram for its location.

graphic

Customer: replied 4 years ago.
ok i will look at that is it in the same place on the v8 as the v6 ?
Expert:  fix that car replied 4 years ago.
I don't show a 5.3 in 1999, are you sure you have a 5.3? what is the prodution date on your drivers door?
Customer: replied 4 years ago.
06-99 change body stile that year looks like 2000 sticker under hood 5.3
Expert:  fix that car replied 4 years ago.
OK I had to do some digging, all my books only show a 4.3. however 1 showed a 5.3 and the oil pressure switch should be in the same place as the 4.3
fix that car, GMC Mechanic
Category: GM
Satisfied Customers: 493
Experience: working on all makes of GMC cars and trucks for over 15 years
fix that car and 8 other GM Specialists are ready to help you
Customer: replied 4 years ago.
ok ill try that thanks for your help
Expert:  fix that car replied 4 years ago.

let me know if you need more help

thanks for useing J.A.

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