I went thru this hassle. Just b/c scanner is expensive or claims to read abs does not mean it will work on your make, model, yr. Save yourself hassle & go to gm dealer w/ tech II scanner & get ALL, including 'u' codes in writing.

If youre morally opposed to dlrs, go to gpona.com & create account to access service manual-it has wiring diagrams, pinouts, & testing procedures.

Good luck