The past week or so it is very difficult to find reverse and pops out of first sometimes.I have a B&M shifter.Does this seem like a big trans problem or maybe a shifter adjustment. I do have a GM extended warranty.

 

I have a 03 6 sp and have not experienced those symptoms. I would first make sure all the adjustments are correct on the shifter. I would then change the tranny oil. When I changed mine it shifter alot easier and smoother.

 

Change the trans fluid times two

It helps....

 

This happens a lot in my moms C6. I have a hurst shifter in mine, and never experienced the problem...

 

My 99 used to do this all the time. I had the reverse lock-out solenoid checked and it was working fine but the tech found it was sometimes getting low voltage. He replaced the battery and it's worked perfectly ever since. Try this trick: rev the motor to about 2,000 (bring your voltage gauge up a bit) and see if it gets easier to find reverse.

 

Do the ranger method... Takes about 2 bottles of fluid, but works well, it's easy to do, and should fix your problem.

 

You might also consider servicing the clutch. If the fluid's been in there a long time, it could be that it's not disengaging as well as it should.

I had mine serviced a few weeks ago - the fluid was absolutely terrible.

Shifting improved noticeably.

 

Before you spend any $$$ inspect your shifter alignment.
The stock shifters have an alignment pin to prevent this. Most aftermarket ones do not.

Most aftermarket shfiters have the travel or throw length adjusted with set screws ( llen screws) held in place with jam nuts.
Over time the jam nuts vibrate loose, the set screws turn in, reducing the travel or throw length and preventing you for going far enough forward to get into 1,3,5,R or rearward into 2,4,6.

Remove the shift **** ( pop off the top), pull out the demon key (vice grips , hammer.. while pulling up on the grips, tap the side of the grips sharply with the hammer, the key will pop out)
remove the center console, remove the bolts holding the shifter in place.

the adjustments should become obvious hour will need an appropriate sized allen wrench and the appropiate sized box wrench.
loosen the jam nuts, turn out the set screw, put the car in 1st, adjust the set screw to just touch the shifter shaft. tighten the first jam nut, check 1 again then 3,5,R if good tighten the second jam nut. If not lossen and adjust further.

After mine happened second time, after I was certain the adjustment was correct I used blue locktite...

while you are in there, check to make sure that the rearward nuts are not loose or you will be repeating this in the future.....