NHTSA ID Number: 10139388
Manufacturer Communication Number: PIT5253B
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent crank / no start concern. Technician may find a Diagnostic Trouble Code in the Engine Control Module P1682. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Code. If Service Information diagnostics lead to a root cause of the concern technician should replace the Engine Controls Ignition Relay # 70 with part number 13595908.
8 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
CHEVROLET | SILVERADO 1500 | 2014-2015 |
| CHEVROLET | SILVERADO 2500 | 2015 |
| CHEVROLET | SILVERADO 3500 | 2015 |
| GMC | SIERRA 1500 | 2014-2015 |
| GMC | SIERRA 2500 | 2015 |
| GMC | SIERRA 3500 | 2015 |
Condition/Concern
Intermittent crank / no start concern. When checking for DTCs, the ECM will have a P1682 set.
If after normal diagnosis a correction is not found, this could be caused by an issue with the KR75 Engine Controls Ignition Relay #70.
Parts
| Description | Qty | Part Number |
| Relay | 1 | 13595908
General Motors Chevrolet GM OEM 17-18 Impala 3.6L-V6 Fuse Relay-Relay 13595908
Last update on 2026-07-04 / Affiliate links / Images from Amazon Product Advertising API |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5253B
Date: Mar-2015
NHTSA ID Number: 10111867
Manufacturer Communication Number: PIT5253A
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent crank / no start concern. Technician may find a Diagnostic Trouble Code in the Engine Control Module P1682. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Code. If Service Information diagnostics lead to a root cause of the concern technician should replace the Engine Controls Ignition Relay # 70 with part number 13595908.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5253A
Date: Mar-2014
NHTSA ID Number: 10070593
Manufacturer Communication Number: PIT5253A
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PIT5253A
Date: March, 2014
SB-10070593-0335.pdf 223.221KB
NHTSA ID Number: 10112046
Manufacturer Communication Number: PIT5253
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent crank / no start concern. Technician may find a Diagnostic Trouble Code in the Engine Control Module P1682. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Code. If Service Information diagnostics lead to a root cause of the concern technician should replace the Engine Controls Ignition Relay # 70 with part number 13500118.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5253
Date: Jan-2014
- Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
- 12-volt 5-prong relay. Excellent water-repellent and dustproof ability, but not using it in water
- Be careful when inserting the relay into the socket. If you force it, you will bend the female connectors
- Primary leads use 12 a.w.g tinned copper wire. Coil leads use 16 a.w.g
- Nominal Coil Voltage: 12 V DC; Coil Power: 1.8 W; Coil Resistance: 80 Ω; Must Operate Voltage: 6~8 V DC; Must Release Voltage: 0.6~3.6 V DC; Maximum Applied Voltage: 15.6 V DC
- Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.
- Small size/Low power consumption/High contact voltage/ High sensitivity.
- Contact Material: Ag Alloy / Contact Resistance: ≤ 100MΩ.
- Minimum operating voltage 8V, corresponding minimum operating current is 100mA; Standard operating voltage 12V, corresponding standard operating current is 150mA.
- Life Expectancy Electrical: 100,000 Operation, Life Expectancy Mechanical: 10,000,000 Operation.
- High switching capability: Normally open 40A/14V DC and normally close 30A/14V DC. Suitable for Nilight LED light bar wiring harness kit
- Premium quality: Durable relay and harness socket with 5 wires; Made by high-grade materials to ensure superior quality and long lifespan
- Male-female slot design: Unique male-female slot design, easy to connect the relay with harness socket, clean and neat after installation
- Easy wiring: The relay sockets come with different colors for loads/accessories, simple and convenient wiring
- Package include: 5 x relay and 5 x relay socket with wires.Fit type: Universal fit
- Upgraded Version - Automotive relays built in fuse socket included 30A blade fuse with heavy duty 14AWG wires for main contact. no need of a separate fuse holder, saving space and money. 4-Pin SPST (Single Pole Single Throw) Relay.
- Mounting Design Feature - The interlocking mounting design of unique male and female slot on each socket edge, connect relays together and manage cables easily, offering clean and neat installation.
- Easy Wiring - The relay sockets come with color-labeled wires for load/accessories convenient wiring. Black - Ground (85), Red - VDC (30), White - Trigger (86), Blue - Output N/O (87)
- Wide Application - Widely used in car keys power control, over-load protection, trunk release, polarity change, power door lock/actuator control, change a low current output to high current, add ignition/accessory outputs, control motors/other electronics etc.
- Set includes 5 relays, 5 relay harnesses, and 5 30A blade fuses.
Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API
SEOCONTENT-START
Bulletin No.: PIT5253B
Date: Mar-2015
| Subject: | Intermittent Crank No Start With DTC P1682 |
| Models: | 2014 Chevrolet Silverado 1500 |
| 2015 Chevrolet Silverado |
|
| 2014 GMC Sierra 1500 | |
| 2015 GMC Sierra | |
| Built Before: | |
| 1/28/15 at Flint Assembly (11th Vin Digit “F”) | |
| 2/5/15 at Silao Assembly (11th Vin Digit “G”) | |
| 2/5/15 at Ft. Wayne Assembly (11th Vin Digit “Z”) |
This PI was superseded to update Models and Vin Breaks. Please discard PIT5253A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some owners may comment of an intermittent crank / no start concern. When checking for DTCs, the ECM will have a P1682 set.
If after normal diagnosis a correction is not found, this could be caused by an issue with the KR75 Engine Controls Ignition Relay #70.
Recommendation/Instructions
If no other root cause is identified through normal diagnosis, replace the KR75 Engine Controls Ignition Relay # 70 (located in the UBEC) with part number 13595908.
| Description | Qty | Part Number |
| Relay | 1 | 13595908
General Motors Chevrolet GM OEM 17-18 Impala 3.6L-V6 Fuse Relay-Relay 13595908
Last update on 2026-07-04 / Affiliate links / Images from Amazon Product Advertising API |
Warranty Information
For vehicles repaired under warranty use:
| Labor Operation | Description | Labor Time |
| 5480058* | Diagnosis and Replace the Engine Control Module Mini Relay #70 in the UBEC (KR75 Engine Controls Ignition Relay) | 0.4 hr |
| * This is an unique labor operation for bulletin use only. This will not be published in the Labor Time Guide. | ||
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
SEOCONTENT-END
This product presentation was made with AAWP plugin.
I believe PIT 5253B is useful for GM car owners who suffer the code P1682.Thanks for this info.
Where is this PIT5253B relay located in my 2014 Sierra?
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