2004 Sierra tranny problems

[Dave686]

I have a 2004 GMC Sierra with an automatic and a 4.8. My wife has been reporting that sometimes when she throws it into reverse even though the selector says R it's in neutral and she's gotta throw it back into park and reverse, and on and on till it catches. Now I drive the truck more that she does and it's never happenned to me so..... Could it have something to do with her key? Or just a lose tranny linkage? Maybe the trucks just wearing in (24000km) but it bugs me why its happenned to her 5 or 6 times but noe me, also she's had the 4wd warning light come on for her a few times but not me. Any ideas?

[snoman]

I have a 2004 GMC Sierra with an automatic and a 4.8. My wife has been reporting that sometimes when she throws it into reverse even though the selector says R it's in neutral and she's gotta throw it back into park and reverse, and on and on till it catches. Now I drive the truck more that she does and it's never happenned to me so..... Could it have something to do with her key? Or just a lose tranny linkage? Maybe the trucks just wearing in (24000km) but it bugs me why its happenned to her 5 or 6 times but noe me, also she's had the 4wd warning light come on for her a few times but not me. Any ideas?

 

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There is a electronic module on side of tranny the shifter is hooked to that actually shifts the tranny. I suspect the linkage is a little out of adjust meant and it is not a sign of a serious problem.

[Dave686]

Thanks, but how come it's never happenned to me? And she cant be doing anything wrong it's not too hard to shift an auto.

[snoman]

Thanks, but how come it's never happenned to me? And she cant be doing anything wrong it's not too hard to shift an auto.

 

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She may put it in the gear detent just a bit diferent that you do. I had my torque converter and front pump replaced last winter on my truck under warranty and they replaced control module too but they got it a tad bit out of adjustment because occaisionly I have to bump the shift up a bit in OD postion for OD to engage but it does not happen often and I have not looked into it yet.