1999 gmc my oil smell like gas but not mikey...keep adding antifreeze to rad ...sometimes white smoke come out of tailpipe..but not all the time...why can someone please explain


Asked by Jan 22, 2015 at 06:12 AM about the 1998 GMC Sierra C/K 1500

Question type: Maintenance & Repair

4 Answers


Time for a new or rebuild engine. Gas in oil is bad piston rings. Having to add anti-freeze and white smoke means blown gasket(s) somewhere or cracked head(s) or block.

Andrew Olsen

On the vortec motors gas in the oil is a sign of a bad fuel pressure regulator. As for the coolant loss u got me.


With oil smell like gas....just thinking could it be a Leakey injector....the antifreeze maybe intake gasket..please your information and input will help me out..thanks


With oil smelling like gas you have either a bad head gasket or intake gasket, with the white smoke it can be either burning oil, burning antifreeze, or a combination of both. If you put your hand by your exhaust and then smell your hand does it smell like oil or antifreeze? Either way your going to need to rebuild the motor or get all rings and gaskets replaced. But once your oil goes milky its best to rebuild the motor.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Sierra C/K 1500

Looking for a Used Sierra C/K 1500 in your area?

CarGurus has 4 nationwide Sierra C/K 1500 listings and the tools to find you a great deal.


Search GMC Sierra C/K 1500 Questions

GMC Sierra C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 110
#1 John Saffrahn
John Saffrahn
Reputation 110
#3 tennisshoes
Reputation 80
View All

Related Models For Sale

Used GMC Sierra 1500"
1,028 Great Deals out of 56,923 listings starting at $2,300
Used Chevrolet Silverado 1500"
2,453 Great Deals out of 144,774 listings starting at $1,995
Used Ford F-150"
3,272 Great Deals out of 216,647 listings starting at $1,500
Used Chevrolet C/K 1500"
1,138 listings starting at $2,400
Used GMC Sierra"
39 listings
Used Chevrolet C/K 2500"
287 listings starting at $1,995
Used Toyota Tacoma"
625 Great Deals out of 30,504 listings starting at $2,850
Used Dodge Ram 1500"
522 Great Deals out of 13,738 listings starting at $995
Used Chevrolet Silverado 2500"
3 Great Deals out of 271 listings starting at $3,499
Used Chevrolet C/K 3500"
299 listings starting at $5,995