I don't make a lot of personal posts so please bear with me. #Rufus hasn't been doing well for the past week or so. I mean, he's 13 (at least), and has slowed down due to age, but the past week or two he's been acting like every movement is a Herculean effort. A few times in the past couple of weeks his rear legs have given out on him completely to where I've had to pick him up and carry him which is, in itself, telling. Rufus has always hated being carried and struggled continuously when I did so. Yesterday while petting him I noticed two golf-ball sized things up under his chin. Now, they may be benign lipomas as Rufus is covered with them (one one each thigh, one on each shoulder, one on his chest and a few smaller bumps here and there) or they may be indicative of something else. I'm no vet and aside from emergency medic battlefield training I have no medical experience whatsoever, but these new things seem to be where your or mine lymph nodes are located....
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The most likely reason your not getting a error code is because none of the sensors are bad. Most likely it's a bad connection or a short on the trans somewhere. My Dad hated the 4L60. He'd been stuck quite a few times, when he test drove for GM!
This is the problem I have with these forums. They assume everyone has the same level of experience with the subject matter. VSS? PCM? Although, I think that's the truck's computer.
Since I only buy old iron (vehicles) this has been a life-saver more than two or three times. I drive a '94 Chevy Sierra P/up & a '96 Sable for reference.
That article you posted, Curtis, says something about coolant ... I do have a slight coollant leak from the reservoir well, but not between the radiator and the engine.Nothing serious, I just never keep extra coolant in the well unless I'm adding more.