TSB: MACK ANTHEM, ANTHEM (AN), CHU, CXU, GRANITE (GR), GRANITE (GU), GU, LEU, LR, LR ELECTRIC, LR6, MRU, PINNACLE (CHU), PINNACLE (CXU), PINNACLE (PI), TD, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TERRAPRO (TE), TITAN, TITAN (TD), VAH, VHD, VNL, VNM, VNR, VNX (2007–2022)

Bulletin CBR-15 — June 15, 2021

Bulletin Details

Bulletin IDCBR-15
ManufacturerMACK
ModelsANTHEM, ANTHEM (AN), CHU, CXU, GRANITE (GR), GRANITE (GU), GU, LEU, LR, LR ELECTRIC, LR6, MRU, PINNACLE (CHU), PINNACLE (CXU), PINNACLE (PI), TD, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TERRAPRO (TE), TITAN, TITAN (TD), VAH, VHD, VNL, VNM, VNR, VNX
Model Years2007–2022
Date IssuedJune 15, 2021
Date Added to NHTSAJuly 5, 2021
ComponentENGINE AND ENGINE COOLING
Vehicles Affected176 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Diagnostic Trouble Codes (DTC) For The Engine Pre-Heat Relay: Supplementary Instructions

Affected Vehicles

MakeModelYearComponent
MACK PINNACLE (CHU) 2022 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2022 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2022 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM (AN) 2021 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2021 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2021 060000 ENGINE AND ENGINE COOLING
MACK LR 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2021 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2021 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (TE) 2021 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2021 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM (AN) 2020 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2020 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2020 060000 ENGINE AND ENGINE COOLING
MACK LR 2020 060000 ENGINE AND ENGINE COOLING
MACK LR ELECTRIC 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2020 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2020 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2020 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (TE) 2020 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2020 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM (AN) 2019 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2019 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2019 060000 ENGINE AND ENGINE COOLING
MACK LR 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2019 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2019 060000 ENGINE AND ENGINE COOLING
MACK TD 2019 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2019 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (TE) 2019 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2019 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM (AN) 2018 060000 ENGINE AND ENGINE COOLING
MACK CHU 2018 060000 ENGINE AND ENGINE COOLING
MACK CXU 2018 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2018 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2018 060000 ENGINE AND ENGINE COOLING
MACK GU 2018 060000 ENGINE AND ENGINE COOLING
MACK LR 2018 060000 ENGINE AND ENGINE COOLING
MACK MRU 2018 060000 ENGINE AND ENGINE COOLING
MACK MRU 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2018 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (PI) 2018 060000 ENGINE AND ENGINE COOLING
MACK TD 2018 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2018 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (TE) 2018 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2018 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2018 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM (AN) 2017 060000 ENGINE AND ENGINE COOLING
MACK CHU 2017 060000 ENGINE AND ENGINE COOLING
MACK CXU 2017 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2017 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2017 060000 ENGINE AND ENGINE COOLING
MACK GU 2017 060000 ENGINE AND ENGINE COOLING
MACK LEU 2017 060000 ENGINE AND ENGINE COOLING
MACK LR 2017 060000 ENGINE AND ENGINE COOLING
MACK MRU 2017 060000 ENGINE AND ENGINE COOLING
MACK MRU 2017 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2017 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2017 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2017 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2017 060000 ENGINE AND ENGINE COOLING
MACK TD 2017 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2017 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2017 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (TE) 2017 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2017 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2017 060000 ENGINE AND ENGINE COOLING
MACK ANTHEM 2016 060000 ENGINE AND ENGINE COOLING
MACK CHU 2016 060000 ENGINE AND ENGINE COOLING
MACK CXU 2016 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GR) 2016 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2016 060000 ENGINE AND ENGINE COOLING
MACK GU 2016 060000 ENGINE AND ENGINE COOLING
MACK LEU 2016 060000 ENGINE AND ENGINE COOLING
MACK LR 2016 060000 ENGINE AND ENGINE COOLING
MACK LR6 2016 060000 ENGINE AND ENGINE COOLING
MACK MRU 2016 060000 ENGINE AND ENGINE COOLING
MACK MRU 2016 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2016 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2016 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2016 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2016 060000 ENGINE AND ENGINE COOLING
MACK TD 2016 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU) 2016 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2016 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2016 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2016 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2016 060000 ENGINE AND ENGINE COOLING
MACK CHU 2015 060000 ENGINE AND ENGINE COOLING
MACK CXU 2015 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2015 060000 ENGINE AND ENGINE COOLING
MACK GU 2015 060000 ENGINE AND ENGINE COOLING
MACK LEU 2015 060000 ENGINE AND ENGINE COOLING
MACK LR 2015 060000 ENGINE AND ENGINE COOLING
MACK LR6 2015 060000 ENGINE AND ENGINE COOLING
MACK MRU 2015 060000 ENGINE AND ENGINE COOLING
MACK MRU 2015 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2015 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2015 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2015 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2015 060000 ENGINE AND ENGINE COOLING
MACK TD 2015 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU) 2015 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2015 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2015 060000 ENGINE AND ENGINE COOLING
MACK TITAN 2015 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2015 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2015 060000 ENGINE AND ENGINE COOLING
MACK CHU 2014 060000 ENGINE AND ENGINE COOLING
MACK CXU 2014 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2014 060000 ENGINE AND ENGINE COOLING
MACK GU 2014 060000 ENGINE AND ENGINE COOLING
MACK LEU 2014 060000 ENGINE AND ENGINE COOLING
MACK LR 2014 060000 ENGINE AND ENGINE COOLING
MACK LR6 2014 060000 ENGINE AND ENGINE COOLING
MACK MRU 2014 060000 ENGINE AND ENGINE COOLING
MACK MRU 2014 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2014 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2014 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2014 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2014 060000 ENGINE AND ENGINE COOLING
MACK TD 2014 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU) 2014 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2014 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2014 060000 ENGINE AND ENGINE COOLING
MACK TITAN 2014 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2014 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2014 060000 ENGINE AND ENGINE COOLING
MACK MRU 2013 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2013 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2013 060000 ENGINE AND ENGINE COOLING
VOLVO VNX 2013 060000 ENGINE AND ENGINE COOLING
MACK MRU 2012 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2012 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2012 060000 ENGINE AND ENGINE COOLING
MACK MRU 2011 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2011 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2011 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2010 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2010 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2010 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2009 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2009 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2009 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2008 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2008 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2008 060000 ENGINE AND ENGINE COOLING
MACK MRU 2007 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2007 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2007 060000 ENGINE AND ENGINE COOLING
MACK CHU 060000 ENGINE AND ENGINE COOLING
MACK CXU 060000 ENGINE AND ENGINE COOLING
MACK GU 060000 ENGINE AND ENGINE COOLING
MACK LR 060000 ENGINE AND ENGINE COOLING
MACK TD 060000 ENGINE AND ENGINE COOLING
VOLVO VAH 060000 ENGINE AND ENGINE COOLING
VOLVO VHD 060000 ENGINE AND ENGINE COOLING
VOLVO VNL 060000 ENGINE AND ENGINE COOLING
VOLVO VNM 060000 ENGINE AND ENGINE COOLING
VOLVO VNR 060000 ENGINE AND ENGINE COOLING

Related MACK Recalls

CampaignModelYearComponentSummary
ANTHEM AN (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
ANTHEM AN (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2025 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MACK dealer. Bring this bulletin ID (CBR-15) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.