Information on Diesel Exhaust Fluid Pump is Unable to Build Pressure After Replacement – 2017-2022 Cadillac Chevrolet GMC

2020 Chevrolet Silverado

NHTSA ID Number: 10205057 Manufacturer Communication Number: 20NA110   Summary This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.     61 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021 CADILLAC ESCALADE ESV 2021 CHEVROLET 4500HD 2021 CHEVROLET 5500HD … Read more

6.0L L96 Low Oil Pressure And/Or P0521 – 2019 Chevrolet & GMC

2019 Chevrolet Silverado

NHTSA ID Number: 10163661 Manufacturer Communication Number: PIP5630A Summary This Preliminary information communicates A vehicle may have a concern of no oil pressure and/or P0521 set. the relief valve in the pump is sticking or the number 1 main bearing is damaged. Drop oil pan and confirm #1 main is spun or not.  If bearings are OK Then … Read more