NHTSA ID Number: 10178357
Manufacturer Communication Number: PIT5756
Summary
This Preliminary information communicates an issue with the underhood electrical center bolts being loose which can cause any of the following symptoms:
– No crank
– No start
– Starter grinds or reengages after engine running
– Headlights flicker or flash
– SES MIL
– IPC gauges sweep/fluctuate and various IPC warning lights or messages
– High or low system voltage
Some of these concerns may be notices with powertrain movement, like when either accelerating or braking.
4 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CHEVROLET | SILVERADO 1500 | 2019 |
| CHEVROLET | SILVERADO 2500 | 2020 |
| GMC | SIERRA 1500 | 2019 |
| GMC | SIERRA 2500 | 2020 |
Bulletin No.: PIT5756
Published date: 06/26/2020
Preliminary Information
PIT5756 Various Electrical Concerns (Inspect UBEC Bolts For Being Loose)
Models
Brand:
Model:
Silverado 1500 (New Model) Silverado
Sierra 1500 (New Model) Sierra
Model Years:
2019
2020
2019
2020
VIN:
from to
All All
All All
All All
All All
All All All All
Transmissions:
All All All All
Involved Region or Country
North America
Condition
Some customers may comment on any number of electrical related symptoms. The following are some of
the known reported ones:
– No crank
– No start
– Starter grinds or re-engages after the engine starts
– Headlights flicker or flash
– SES MIL
– IPC gauges sweep/fluctuate and/or various IPC warning lights or messages
– High or low system voltage
– May have any of the following DTC’s: B1325, B2750, B305D, B297B, C0049, P0562, P0700, U0100,
U0101, U0102, U3006
Some of these concerns may be noticed with powertrain movement, like when accelerating or braking.
Cause
These concerns could be caused by the X50A Underhood Fuse Block bolts (1), shown below, being
loose. The X50A has built in indicators (2), which pop up as the X50A bolts are tightened down, to
indicate that the X50A is fully installed. In some cases,
even if these green indicators (2) are popped up, the bolts (1) may still be loose.
Correction:
Inspect the X50A Underhood Fuse Block bolts (1) and verify they are properly torqued to 53 lb in
(6Nm).
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor Operation Description
Time
*5480808 Inspect X50A UBEC Bolts for proper torque
0.3 hrs
*This is a unique Labor Operation for Bulletin use only.
Version History
Version 1
Modified 06/26/2020 – Created on.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5756
Published date: 06/26/2020
https://www.nhtsa.gov/recalls?nhtsaId=10178357
MC-10178357-9999.pdf 345.435KB
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Last update on 2020-10-23 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2020-10-23 / Affiliate links / Images from Amazon Product Advertising API
 – 2019-2020 Chevrolet Silverado & GMC Sierra){kind=link}
 – 2019-2020 Chevrolet Silverado & GMC Sierra){kind=link}