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several years ago the 1995-1998 GM trucks had ignition switch problems. drive train codes and shifting issues.
1999-2006 GM trucks I have not seen this ignition switch , on the forum with these model years.shift solenoids is a common failure and wear on the valve body. 2005 had Dexron III in your tranny so that could damage the internals creating wear[acid] with the transmission fluid. 20K miles the fluid turns to acid .. 2006 GM dumped dexron III.. GM now changes to dexron VI on these 4l60-80 transmissions..
I dumped dexron III in 1999....
when I change my tranny fluids looks like new.. when I changed fluid when 2000 truck had 18K miles on it it, was nasty mess and a grayish color ....18K miles on it !
1999-2006 GM trucks I have not seen this ignition switch , on the forum with these model years.shift solenoids is a common failure and wear on the valve body. 2005 had Dexron III in your tranny so that could damage the internals creating wear[acid] with the transmission fluid. 20K miles the fluid turns to acid .. 2006 GM dumped dexron III.. GM now changes to dexron VI on these 4l60-80 transmissions..
I dumped dexron III in 1999....
when I change my tranny fluids looks like new.. when I changed fluid when 2000 truck had 18K miles on it it, was nasty mess and a grayish color ....18K miles on it !