P0087 fuel rail pressure low limp under high loads

[Mark Rinker]

(A quick update on a previous thread that I will merge with this final installment.)

Received final decision from GM customer assistance on my injector warranty claim. Denied. They were very polite, and did a fair job of collecting information on the claim, but it was also very clear that two factors weighed heavily in their decision NOT to goodwill the repairs:

• Vehicle was diagnosed at 101,500 miles with high return rates on three injectors, GM tech recommended 8 new sprays.
• Vehicle was not purchased new from a GM dealer, was purchased from a private party. (Two GM customer assistance reps asked me this same question, both of the Service Managers I worked with also asked as well.)

Truck runs fine under 95% of daily use, but will set a P0087 low fuel rail pressure code when towing heavy and in the hills. It is repeatable, under these conditions.

If you read the entire thread , you can see how the scenario unfolded - first P0087 was assumed to be a fuel filter at 99K. Next P0087 was at 101500 and I paid to have a GM dealer diagnose and document as I was on the road.

Make sure you get any oddities DOCUMENTED by a GM dealer BEFORE the 100K cutoff...they aren't as charitable as they once were...