This is the OEM workshop document for the 2021-2023 Chevrolet Colorado and GMC Canyon with the wiring diagram, presented in PDF format. It includes detailed service, maintenance, and repair procedures, as well as wiring diagrams and diagnostic steps. These are the same manufacturer-approved resources relied on by Chevrolet and GMC dealership technicians to keep your truck performing at its best.
| File Format |
PDF |
| File Language |
English |
| You’ll Get |
473 MB |
| Page Count |
10,412 |
| Wiring Diagram |
Included |
| Delivery Method |
Instant Download |
Models Covered
- Chevrolet Colorado (2021-2023)
- GMC Canyon (2021-2023)
Engines Covered
- 2.5L LCV (Inline-4 Gasoline)
- 2.8L LWN (Inline-4 Duramax Diesel)
- 3.6L LGZ (V6 Gasoline)
Transmissions Covered
- Automatic 6L50 (MYB)
- Automatic 8L45 (M5T)
This manual provides detailed instructions for maintenance, disassembly, reassembly, component inspection, adjustment, and diagnostics—intended for use by experienced mechanics. Proper application of this guide will help ensure thorough repairs and maintain your vehicle in peak condition.
Important Note: Before purchasing this manual, please check whether your vehicle is subject to any active service recalls, as authorized dealerships may perform necessary repairs free of charge. When replacing parts, always use genuine OEM components to ensure safety, reliability, and long-term performance.
Table of Contents: 2021-2023 Chevrolet Colorado Repair Manual
Sample Pages
CAUTION: This OEM service and workshop repair manual provides detailed procedures for maintenance, disassembly, reassembly, inspection, adjustment, and diagnostics. It is intended as a comprehensive guide for experienced mechanics. To ensure thorough and accurate repairs that maintain your vehicle’s optimal performance, please read and follow this manual carefully. When replacing parts during any repair work, always use genuine Chevrolet parts to ensure quality, safety, and reliability.
🚙 2021–2023 Chevrolet Colorado – Full Vehicle Overview, Issues, DTCs & Maintenance Guide
The 2021–2023 Chevrolet Colorado is a midsize pickup designed to balance daily usability with strong towing, off-road capability, and a wide range of trims. Available with gasoline and diesel engines, rear- or four-wheel drive, and trims such as WT, LT, Z71, ZR2, and Trail Boss, the Colorado competes directly with popular midsize trucks while offering proven powertrains and solid work credentials.
⚙️ Technical Specifications & Performance
- Engine Options: 2.5L I4 (200 hp), 3.6L V6 (308 hp), 2.8L Duramax Turbo-Diesel I4 (181 hp / 369 lb-ft)
- Transmission: 6-speed manual (limited), 6-speed automatic, 8-speed automatic
- Drivetrain: RWD / 4WD (Auto, High, Low)
- 0–100 km/h: ~7.5 sec (3.6L V6)
- Towing Capacity: Up to 7,700 lb (V6)
- Payload: Up to ~1,550 lb
- Fuel Economy: ~18–25 MPG combined (engine dependent)
- Bed Lengths: 5 ft 2 in / 6 ft 2 in
🔧 Top 10 Common Mechanical Issues (Root Cause & Fix)
- 8-speed automatic transmission shudder
🔍 Root Cause: Torque converter clutch friction material breakdown and fluid degradation.
🛠️ Fix: Perform complete fluid exchange with updated spec; replace torque converter if damage persists.
- Rough shifting (6-speed automatic)
🔍 Root Cause: Outdated TCM calibration and adaptive learning issues.
🛠️ Fix: Update TCM software and reset adaptives.
- Diesel EGR valve clogging
🔍 Root Cause: Soot buildup from short trips and low-load driving.
🛠️ Fix: Clean or replace EGR valve; perform regular highway regeneration drives.
- DEF system warnings
🔍 Root Cause: Faulty NOx sensors or crystallized DEF injector.
🛠️ Fix: Replace affected sensors/injector and flush DEF lines.
- Front suspension clunking
🔍 Root Cause: Worn sway bar links and control arm bushings.
🛠️ Fix: Replace links/bushings with updated components.
- Rear differential noise
🔍 Root Cause: Incorrect gear backlash or contaminated fluid.
🛠️ Fix: Drain/refill with correct fluid; rebuild differential if noise persists.
- Transfer case vibration
🔍 Root Cause: Fluid breakdown and worn bearings (4WD models).
🛠️ Fix: Replace transfer case fluid; inspect bearings.
- Brake pulsation
🔍 Root Cause: Rotor warping from heat buildup under towing loads.
🛠️ Fix: Replace rotors/pads with heavy-duty components.
- Cooling fan failure
🔍 Root Cause: Fan clutch or electric fan motor wear.
🛠️ Fix: Replace fan clutch or motor assembly.
- Fuel injector noise (V6)
🔍 Root Cause: Direct-injection injector wear.
🛠️ Fix: Replace noisy injectors and update ECM calibration.
💡 Top 10 Common Electrical Issues (Root Cause & Fix)
- Infotainment screen freezing
🔍 Root Cause: Software instability in Chevrolet MyLink system.
🛠️ Fix: Perform firmware update or module reset.
- Battery drain overnight
🔍 Root Cause: Parasitic draw from BCM or infotainment module.
🛠️ Fix: Diagnose draw and replace faulty module.
- Check engine light for emissions
🔍 Root Cause: Faulty oxygen or NOx sensors.
🛠️ Fix: Replace sensor and clear codes.
- Remote start failure
🔍 Root Cause: Hood latch switch or key fob communication fault.
🛠️ Fix: Replace hood switch or reprogram key fob.
- ABS warning light
🔍 Root Cause: Wheel speed sensor contamination or failure.
🛠️ Fix: Clean or replace sensor.
- Power window malfunction
🔍 Root Cause: Regulator motor wear.
🛠️ Fix: Replace window regulator assembly.
- Trailer brake controller error
🔍 Root Cause: Faulty trailer module or wiring corrosion.
🛠️ Fix: Repair wiring and update trailer brake module.
- Rear camera intermittent
🔍 Root Cause: Harness damage near tailgate hinge.
🛠️ Fix: Repair or replace camera wiring harness.
- TPMS warning light
🔍 Root Cause: Dead wheel sensor battery.
🛠️ Fix: Replace TPMS sensor and relearn.
- Instrument cluster flicker
🔍 Root Cause: Voltage fluctuation or poor ground.
🛠️ Fix: Repair ground points and update BCM software.
📊 Pros & Cons Comparison with Competitors
| Model |
Pros 👍 |
Cons 👎 |
| Chevrolet Colorado |
Strong V6 & diesel options; Good towing; Off-road ZR2 capability |
Interior feels dated; Transmission complaints |
| Toyota Tacoma |
Excellent reliability; Strong resale; Proven off-road trims |
Outdated transmission; Firm ride |
| Ford Ranger |
Strong turbo engine; Modern tech; High payload |
Transmission learning quirks; Ride stiffness |
| Nissan Frontier |
Simple design; Reliable V6; Comfortable ride |
Lower towing; Less tech features |
| Jeep Gladiator |
Removable roof/doors; Excellent off-road ability |
Poor fuel economy; Noisy ride |
| Honda Ridgeline |
Car-like comfort; Innovative bed features |
Lower towing; Less rugged image |
🛠️ Maintenance Schedule
| Interval ⏱️ |
Maintenance Task 🔧 |
| Every 7,500 miles |
Engine oil & filter replacement |
| Every 15,000 miles |
Tire rotation; brake inspection |
| Every 30,000 miles |
Air & cabin filter replacement |
| Every 45,000 miles |
Transmission fluid inspection/service |
| Every 60,000 miles |
Transfer case & differential fluid change (4WD) |
| Every 100,000 miles |
Cooling system service; belt inspection |
⚠️ Recalls, Advisories & Safety Alerts
- Brake booster fire risk (2021–2022): ABS module could short-circuit when parked.
- Airbag inflator recall (2021): Potential improper deployment.
- Driveshaft separation risk (2021): Improper welds on certain 4WD models.
- Transmission software update (2021–2023): Harsh shifting and stalling risk.
- Fuel pump relay failure (2021): Engine stall risk.
- Rear camera image loss (2022): Software error affecting display.
- Seatbelt pretensioner issue (2021–2022): May not deploy correctly.
- Diesel emissions calibration (2021–2023): Incorrect NOx output reporting.
- Parking brake cable corrosion (2021): Reduced holding ability.
- Trailer brake module fault (2022–2023): Loss of trailer braking assistance.
🧾 Diagnostic Trouble Codes (DTC) Tables
💻 Engine Control Module (ECM)
| Code |
Description |
| P0171 |
System Too Lean |
| P0300 |
Random/Multiple Cylinder Misfire |
| P0420 |
Catalyst Efficiency Below Threshold |
| P0101 |
MAF Sensor Performance |
| P0113 |
Intake Air Temperature High |
| P0299 |
Turbo Underboost (Diesel) |
| P0401 |
EGR Flow Insufficient |
| P0562 |
System Voltage Low |
| P0456 |
EVAP Small Leak |
| P2002 |
DPF Efficiency Below Threshold |
⚙️ Transmission Control Module (TCM)
| Code |
Description |
| P0700 |
Transmission Control System Malfunction |
| P0717 |
Input Speed Sensor No Signal |
| P0720 |
Output Speed Sensor Circuit |
| P0730 |
Incorrect Gear Ratio |
| P0741 |
TCC Performance or Stuck Off |
| P0751 |
Shift Solenoid A Performance |
| P0796 |
Pressure Control Solenoid Performance |
| P0871 |
Transmission Fluid Pressure Sensor |
| P0962 |
Pressure Control Solenoid Low |
| P2763 |
Turbine Speed Sensor High |
🛑 ABS / ESC System
| Code |
Description |
| C0035 |
Left Front Wheel Speed Sensor |
| C0040 |
Right Front Wheel Speed Sensor |
| C0051 |
Steering Angle Sensor |
| C0110 |
ABS Pump Motor Circuit |
| C0131 |
ABS Pressure Circuit |
| C121C |
Torque Request Denied |
| C1234 |
Wheel Speed Correlation |
| C1240 |
Brake Lamp Switch Error |
| C1380 |
ABS Module Internal Fault |
| C1411 |
Yaw Rate Sensor Error |
🎈 SRS Airbag System
| Code |
Description |
| B1000 |
Airbag Control Module Fault |
| B1016 |
Driver Airbag Circuit Open |
| B1020 |
Passenger Airbag Circuit Short |
| B140F |
Seatbelt Pretensioner Fault |
| B1053 |
Side Airbag Deployment Fault |
| B1101 |
Airbag Sensor Low Voltage |
| B1209 |
Occupant Classification Fault |
| B1302 |
Crash Sensor Supply Circuit |
| B1352 |
Crash Event Storage Full |
| B108A |
Seat Position Sensor Fault |
📡 Body Control / CAN Communication
| Code |
Description |
| U0100 |
Lost Communication with ECM |
| U0140 |
Lost Communication with BCM |
| U0121 |
Lost Communication with ABS |
| U0155 |
Lost Communication with Instrument Cluster |
| U1110 |
CAN Bus Off |
| U1008 |
Lost Communication with Steering Module |
| U1403 |
Invalid Data from Climate Control |
| U113E |
Lost Communication with Park Assist |
| U1123 |
Lost Communication with TPMS |
| U0415 |
Invalid Data Received from ABS |
✅ Final Verdict & Conclusion
The 2021-2023 Chevrolet Colorado is a versatile midsize truck offering strong engine options, solid towing capabilities, and impressive off-road features in the ZR2 trim. While it excels in performance and practicality, potential issues like transmission glitches, infotainment system problems, and air conditioning concerns should be addressed with regular maintenance and timely repairs. If you’re considering a used or new Colorado, prioritize trims and configurations that meet your specific needs, and ensure proper service records are maintained for long-term reliability.
