SOURCE: 95 oldsmobile 88 royale
i've also ran into this problem. the only way to get the code is by going to the dealers. they'll take out the stereo and get the numbers off the back and get the code from the manufactor. they might not tell you that but thats what they'll do. i don't know what they will charge you. i just bought another stereo and put it in myself. sorry, i know it's not the answer you were looking for.
SOURCE: engine check light is on
does the car buck on the highway when accelerating under a slight load?
i owned one of these exact cars,3.8 litre.
2 problems. one,the baffles braek in the gas tank,and if you run 1/4 tank or less it will stall in a turn.
mine it was a right turn.
2nd problem,the EGR valve was stuck and it would surge or "buck" on the freeway.
replaced the egr (exhaust gas return)valve and it ran like new.
if the egr valve is code 42,(i do not have the manual in front of me) you have found the problem
check the egr,it can cause the problems you have.
SOURCE: Serpentine belt diagram 94 olds 88 royale
Here's a link to the serptentine diagram for our '94 Olds 88 Royale...
http://www.gates.com/common/part_locator/view_diagram.cfm?id=S6005
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