GMC Sierra 8.1 question

[Unclepudge]

I have an 02 Sierra with the 8.1 and the Lines that run along both sides of the oil pan are leaking, 1st is this common and second I only see the driver's side available from napa ,I know the drivers side is for the engine but is the passenger side for the tranny? can't find them online.

 

[Molson02536]

Correct the passenger side is the transmission and that's a dealer part line. Most of the time a transmission shop will replace the line with a new line that needs to be bent. The per-bent one from the dealer is a one piece line and can not be replaced without lifting the engine to snake the new line in. More common to section the transmission line and reconnecting it with compression fittings. As for the engine oil relocation oil filter line, common for the oil to leak from the fitting where the aluminum line and the rubber hose connect. With a small grinder, cut the cheap circular hose Compression fitting and replace it with a better compression fitting. Much easier and last much better then the replacement oil line and less work. Good luck and repair the transmission line as soon as possible, having the transmission lose transmission fluid will cause extreme transmission damage when the engine is running.

 

[Unclepudge]

Thanks for the info, I just started experiencing the stalling issue which everyone relates to as the crank position sensor problem and it's a recall on 2001 vehicles only not the 2002 ,have you had any experiences with changing this as well, thanks again for your time.

 

[Molson02536]

Make sure the area is clean and be careful not to break the tabs in the wire leads when reconnecting the new crank position sensor. Brake parts cleaner works well on getting the area clean and use a little oil on the rubber gaskets when installing the new sensor.

Most 8.1 liter engines do have a problem with the crank sensor. The only way to really diagnose the problem is to get the engine to stall and not start. You will have to see if you are getting spark wile the engine is cranking. If you are not getting spark, the most likely cause is the crank sensor. You may want to call around a see how much the sensor is to have replaced. The crank sensor is located on the rear of the engine on the drivers side next to the transmission. Its hard to replace even if the sensor comes right out. Sometimes the sensor breaks and you have to extract it from the block. You will have to do this from under the truck. Now if you have spark, then you will need to check the fuel pressure with a fuel pressure gauge, should be around 45-60 psi. Again, the only way to diagnose the problem is to get the engine to stall and not start and check for spark or fuel pressure. The crank sensor and the fuel pump do not set codes when they go out. Auto Zone i believe sells the Crank sensor for around $50.00 and the cost to have it installed at the dealer is around $325.00.

 

[Unclepudge]

That's the problem it only stalls once in a while but I tow a 30ft 5th wheel with the family all summer long and don't want to take a chance with it, I am going to try and get it all done in one shot as I have limited time on a lift at a friends garage and this truck is so big even then I can't go all the way up with his lift, I'll just have to pray that the cps goes easy, I had it not starting and tried my superchip coder to find a code but it came out with a transmission code? thanks for your help I should be getting it back in the shop in the next week or so to fix it?

 

[Unclepudge]

Just wanted to let you know I just finished the cps job, all in all pretty easy, hardest part was getting the bolt out and a bit of work getting the sensor out I sprayed it with wd40 about an hour before but just kept twisting gently back and forth and it came out, only thing I noticed is the plug didn't seem to fit as good as the factory cps but no programming needed as I read in some previous post, thanks again for your help and saving me $340.00 in labor from the dealer.