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Okay here is the deal. I have been losing oil out the dipstick tube. Now it doesn't gush out but you can see it trickle past the dipstick. I finally had a warm day to test the CDR. With the clear tube hooked up to the dipstick tube, I get bubbles in the water jug at idle. At 2000 rpms, still...

Please help. I have oil leaking out the dipstick tube. It looks like the CDR is the same as it still has a blue sticker on it that says what way is up. Truck starts fine and I will be doing new injectors and glows at the end of the month. Truck runs fine, idles fine and has plenty get up and go...

Like the title says, I have a couple of trouble codes that I don't know how to fix. I get the SES light on only after hard acceleration on the highway. Like when I go to pass someone. After I pass and slow back down to highway speed (65), the light comes on for a few miles then goes off. The...

The 30mm socket required to change injectors, is there anything special about it. I know it designed to not break off the nipples, but is how does this work? Does the socket only allow the injector to go in about 3/8 of an inch into the socket? I know it also has the 6 sided end for a wrench...

I got a noise that I tell if it is a rocker or sticking injector. Only hear it at idle and it seams to go away as you throttle up. Cant hear it while in the cab or driving down the road. Listen and let me know what you think. Injectors and glows I am pretty sure have 150,000 miles on them...

I took my fan out to see if I could oil it. It has been making a lot of noise since the cold weather. When I got the fan out the blades were dirty and so was the motor where you could see in the vent tube hole. Blew the motor out, washed the fan blades, oiled the motor and reinstalled. Here...

I posted earlier that I thought my LP was going out. Test showed that it is working. I plan on doing the OPS mod soon. I am having hard start issues and was directed to test my ECT sensor. With the OHM meter I am getting a reading of 3.48 ohms. I would assume that the ECT is bad. I...

I have been reading how you are supposed to hear your lift pump running when you shut off your vehicles for a few seconds. Well I have been trying to hear mine after I shut it down and I finally heard it. Couple of questions: 1) can you hear it running while the truck is running? I cant...

Right before Christmas the SES light came on for about 2 miles on the highway then went off. Then just a few days ago my wife said it came on again for just a few miles and then went off. She was on the highway as well. Both times the wind was blowing 30 mph or more. A light drifting snow was...

Need a power window switch for the passenger side for a 94 yukon. Switch works to go down but not up. Driver side works fine to control passenger window. Autozone or O'reill'ys does not have it. Rockauto has it but no picture. Would like to be sure before ordering and would prefer local but...

Is there a website or a link with what the codes mean? Or even a sticky? Thanks.

New here and this is my first post. I currently have a 1994 GMC Yukon that I recently picked up. I have searched and read many post about the OPS, LP and the relay mod. I am pretty sure how to begin this task but I do have a few questions. If you look at the 2nd picture you will see...