Motor number where are the number identification motor

Sounds like a network communication issue.
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that modules node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds . When no message is detected from a learned identification number for 5 seconds , a DTC U1???.
??? is equal to the 3 digit identification number of the module. Control Module ID = BCM
I would start checking ALL ground wires/straps on this vehicle. That has been a problem with GM. Try clearing the code and see if it comes back after you clean ground connections.

Chevy Casting Number identification - Block casting numbers

outintheshop.com/faq/casting/castings2.htm
Chevy Block Casting Numbers. Use these casting numbers to identify the block you have. ... 283. car & Truck 2-bolt. 3790721. 64-67. 327. 2-bolt Chevy II Nova Recessed filter. 3791362. 66-67. 327 ...... Vortec Truck L-35. 12554290. 350. 94-96.

1. Locate and record the engine Vehicle Identification Number (VIN). If the engine has been replaced this number will be different than the VIN on the vehicle body.
How to Find VIN Numbers on an Engine Block eHow
2. Lookup the VIN number in an online database such as CARFAX.
Vehicle Identification Numbers VINs

run your Vechicle Identification Number by your dealership and they will be glad to give you the stepper motor number, availability and cost for installation.

Hi Simon,here's a link to where your engine number is. Repair Guides Engine Identification Engine Identification AutoZone com Here's another for what each number means. Repair Guides Vehicle Identification Number vin Vehicle Identification... Here's a link with your vin numbers to check out parts and buy,I have bought parts from here,I have a silver 85 nissan 720 4x4 in mint condition. Part Detail need more help,just reply back Simon.Here's my nissan, 85 Nissan 720 4x4 Silverbullet 4 with Samantha YORKIE at the wheel look...

Can't tell you direct, in the UK you can contact a parts supplier and provide the vehicle registration number, they have a data base that should be able to give you the info.

THE ENGINE SERIAL NUMBER IS STAMPED ON THE SIDEWALL OF THE CYLINDER BLOCK AT THE TRANSAXLE SIDE. THE BODY NUMBERS IS ON THE VECHICLE IDENTIFICATION NUMBER PLATES LOCATED AT THE TOP LEFT OF THE INSTRUMENT PANEL.AND AT THE FIREWALL IN THE ENGINE COMPARTMENT.YOUR VECHICLE REGISTRATION IDENTIFICATION CARD IN GLOVECOMPARTMENT HAS VECHICLE IDENTIFICATION NUMBER.THE 17TH DIGIT CODE IDENTIFIES MODEL - YEAR - BODY TYPE. NUMBER 8 COUNTING FROM THE LEFT IDENTIFIES THE ENGINE USED IN VECHICLE.

look under the hood there should be a label that says what size it is,or take the vin number to the dealer and they can tell you by vin#