2004 Chevrolet Suburban 1500 Q&A

2004 Chevrolet Suburban 1500 Question: Transmission slipping but no CEL or DTC codes

No indicator lights at all. Trans slipping from 1st gear on. Fluid level good, changed fluid and filter, still happening. Using a Matco MD9040 reader I get no DTCs. HELP! -
Answer 1
sounds like a bad transmission. the friction plates may have lost their friction material. how many km -
Comment 1
117k on the truck. I thought that would be the problem but I was hoping there may have been a cheaper solution. Thanks for the response gearhead -
Comment 2
another possibility is sticky valves. try some lucas brand transmission fix. sometimes this will help. maybe even fix it if the friction plates are okay -
Comment 3
Unfortunately you were right. Took it to an Aamco shop and 3rd and 4th gear are shot, most likely the friction plates. I'm disappointed with this Trans. I always did the services and didn't beat it at all. 2k for a rebuild. Thanks for the input gearhead. I appreciate it. -