Bulletin No.:

Service Bulletin

Date:

23-NA-010
February, 2023

INFORMATION
Subject:

2023 Chevrolet Colorado and GMC Canyon New Model Features

Brand:

Model:

Chevrolet

Colorado

GMC

Canyon

Model Year:
from

to

2023

2023

VIN:
from

to

Engine:

Transmission:

Involved Region or Country

Overview
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.

GMC Canyon Features

6262365

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6262366

This purpose of this bulletin is to introduce the
redesigned 2023 Chevrolet Colorado and GMC
Canyon. The bulletin will help the Service Department
Personnel become familiar with the engines,
transmission, brake system and some of the other
vehicle systems.
Copyright 2023 General Motors LLC. All Rights Reserved.

All Canyons are Short Bed Crew Cabs (22MY
80%+)
2WD Only Offered on Elevation – Stronger
4WD Mix
Elevation Standard Trim Removed

Page 2

February, 2023

Bulletin No.: 23-NA-010

6262377

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Standard LED Lighting Across the Lineup
Completely Re-Designed Front End & Grille
New Hood Design Optimized for Driver Visibility
Standard Off-Road Cut-Outs & No Air Dam
Much Stronger Approach Angle, Ground
Clearance

6262378

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High Clearance Bumper & Wide, Pronounced
Fenders
First Time Offering Sunroof
Standard ALL TERRAIN TIRES, 33” MT ON AT4X
NEW 2.7L TURBO HIGH-OUTPUT ENGINE

6262379

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11.3” Center Touchscreen Standard on all Models
Up to 10 Available Camera Views Including
First-In-Class Front and Rear Underbody

Chevrolet Colorado Features

6262369

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Class-leading 10 camera views including
class-exclusive underbody camera
Class-leading 11.3” standard center touchscreen
& fully digital instrument cluster
Suite of Trailering & Off-Road Apps
Powerful and durable 2.7L Turbo Engine
New 8-speed Transmission
Four distinct interiors with unique colorways and
executions

Bulletin No.: 23-NA-010

February, 2023

Page 3

Engine
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Good / Better / Best approach provides large
bandwidth within one engine family
Enhanced smoothness and sound management
High-Output variant offers 430 lb.-ft. of torque,
projected to be best in class gas torque rating
Lower mass than outgoing 3.6L V6 but more
horsepower
Active thermal management with Electric water
pump keeps engine structure and turbo cool even
in the most extreme conditions
Horsepower

6262376

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Rugged and sporty exterior design with ingenious
new bed functionality built-in
More leveled stance in body lines and trim
Proud hood profile, high grille, and slim lamps for
a strong look
3 distinct chassis setups
Designed for up to 33” OD tires

Torque

Max
Towing
(LBS)

2.7L
Turbo

237

3,500

2.7L
Turbo
Plus

310

391 LB-FT

7,700

2.7L
Turbo
HighOutput

310

430 LB-FT

7,700
(6,000 LBS
on ZR2)

Transmission
Overview

6262371

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Class-leading standard 11.3” center touchscreen
Segment-first fully digital instrument cluster
Segment-first electronic parking brake
Piano key toggle switch bank
Friction hinge on center console armrest ensures
armrest will stay open at any angle while
customers retrieve items from storage area below

6262364

The 2023 Chevrolet Colorado and GMC Canyon offer
two transmissions.
• 8L45 (N8R) eight-speed automatic transmission
• 8L80 (MFC) eight-speed automatic transmission

Page 4

February, 2023

8L45/8L80 (N8R/MFC) Automatic Transmission
The 8L45/8L80 (N8R/MFC) operates with a
combination of mechanical and electrical components.
The electrical components are in the lower part of the
valve body assembly. The mechanical components are
a torque converter, planetary gear set, pump, clutches,
and bands.
The mechanical components of the 8L45/8L80 (N8R/
MFC) transmission are as follows:
• Torque converter with an electronically controlled
capacity clutch
• Binary vane-type fluid pump assembly
• 1-5-6-7 clutch assembly
• 2-3-4-6-8 and 4-5-6-7-8 reverse clutch assembly
• Direct/overdrive internal gear assembly
• Direct/overdrive carrier assembly
• Input internal gear assembly
• Input carrier assembly
• Input sun gear assembly
• Reaction internal gear and 1-2-3-4-5 reverse hub
assembly
• Reaction carrier assembly with output internal
gear assembly
• Output carrier assembly
• Output shaft
The electrical components are part of the valve body
assembly. Control valve body assembly component are
as follows:
• Input and output speed sensor assembly
• Manual shift shaft position switch
• Control solenoid valve body assembly, which
contains the following components:
– Eight transmission control solenoids
– TCC control solenoid
– Default control solenoid
– 1–2–3–4–5 reverse boost solenoid

Internal Mode Switch
The internal mode switch contains six separate
switches in one assembly. One mechanical switch
circuit is for the PARK/NEUTRAL position switch, which
is used for engine starting. The other five electronic
switches are called the transmission range switches
and are used to indicate the gear position that the
vehicle operator has selected. The internal mode
switch assembly is mounted on the interior left side of
the transmission case.
The PARK/NEUTRAL position switch indicates to the
ECM whether the vehicle is in PARK/NEUTRAL or in a
drive gear range. With the ignition ON, the ECM
provides 12 volts on the PARK/NEUTRAL signal circuit
to the PARK/NEUTRAL position switch. A separate
ground wire from the PARK/NEUTRAL position switch
to the chassis ground completes the circuit.
When the gear shift lever is in PARK or NEUTRAL, the
switch closes and drops the voltage on the signal circuit
to zero volts. In this state, the engine will start and run.

Bulletin No.: 23-NA-010

In REVERSE or DRIVE range, the PARK/NEUTRAL
position switch opens; 12 volts are then present on the
signal circuit, which will inhibit engine starting.
The internal mode switch indicates to the Transmission
Control Module (TCM), which gear position the vehicle
operator has selected. The internal mode switch has
five separate Hall-effect switches. Each switch is
supplied with a 9-volt reference circuit, and a signal
circuit from the TCM.

Binary Pump
The vane-type binary pump design with a fixed
displacement incorporates two inlet ports and two
discharge ports. The output from a fixed displacement
pump varies depending upon the speed of the turning
pump. A binary pump may use the output from either
one or both discharge ports.
At low speeds, both ports supply pressurized fluid to
the transmission to meet demand. Higher speeds
require a lower displacement, and only one discharge
port supplies pressurized fluid. The fluid from the other
discharge port recirculates to the suction side. This
reduces the losses in the system and improves the
overall efficiency of the transmission. Binary pumps
also respond more quickly to a reduction in engine
speed.

Stand Alone Transmission Control Module
The TCM for the 8L45/8L80 (N8R/MFC)) transmission
is a stand-alone controller mounted to the vehicle. The
TCM has one 66-way connector to interface with the
vehicle's electrical system, transmission assembly, and
other vehicle control modules. The TCM sends and
receives various input and output signals from several
switches and sensors that are internal and external to
the transmission. The TCM is part of a network of other
control modules on the vehicle. The network of control
modules share information with one another over a
common serial data communications line.
Based on the calibrations and input information, the
TCM will always have final authority of when to allow an
upshift or downshift, whether in Manual mode operation
or in the DRIVE position for automatic shifting.

Shift Lock Control System
If equipped, the automatic transmission shift lock
control system is a safety device that prevents an
inadvertent shift out of PARK. The driver must press the
brake pedal before moving the PARK lever out of the
PARK position. The system consists of the following
components:
• Automatic transmission park lock solenoid
• BCM
• ECM

Bulletin No.: 23-NA-010

February, 2023

The BCM controls the voltage to the park lock control
solenoid through a dedicated circuit. The following
conditions must be met before the BCM supplies
voltage to the park lock solenoid:
• Ignition is in the ON position
• ECM sends an input via serial data to the BCM,
indicating that the transmission is in the PARK
position
• BCM receives input from the brake pedal position
switch to determine when the brake pedal is
applied
Because the park lock control solenoid is permanently
grounded, the BCM supplies voltage to the automatic
transmission park lock control solenoid, unlocking the
park lever and allowing the driver to move the park