Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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Yes three parts can be bad at the same time. It sounds like they used their scan tool and verified the issue already so unless you have a scan tool to double check their work you will probably have to take their word for it.
From your initial question it sounds like they have already verified the parts are bad. If you have a vacuum leak it should be also setting a lean code. You can do the throttle body yourself. Here is the relearn procedure.
1. Verify coolant temperature and intake air temperature are between 5-60 degrees C. Perform the minimum throttle position learn procedure as follows:2. Turn OFF the ignition for 30 seconds. Turn ON the ignition, with the engine OFF for 1 minute. Turn OFF the ignition for 30 seconds. Turn ON the ignition, with the engine OFF.3. Clear the DTCs with a scan tool.4. Start the engine. Perform the following tests: • Rapidly depress the accelerator pedal from the rest position to the Wide Open Throttle position (WOT) and release pedal. Repeat the procedure several times.• Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.5. Clear the codes with a scan tool and shut off the ignition for 30 seconds.