Chevrolet Silverado 2500/3500 HD Block Heater Guide
2011–2026
Find the part for your engine
Check the engine size on your vehicle documents or under-hood label. Choose it explicitly even when only one option appears.
Already have a factory heater? A missing power cord may be all you need. Match the connector before ordering.
View the full engine and installation tableCatalog candidates for the Chevrolet Silverado 2500/3500 HD are grouped by engine below. Check the source review for the exact application before choosing a heater or cord; shared engine size alone does not confirm fitment.
Factory availability
Factory option or dealer accessory in Canada, depending on year and trim
Cord location
Most installs route the cord to the front grille or bumper area, driver's side. Check for an existing coiled cord before buying anything.
Chevrolet Silverado 2500/3500 HD engines & block heater part numbers
Engine list built from Natural Resources Canada model-year data. Part numbers are catalog candidates unless a source review is shown for that application. Confirm the exact engine code, model year and installation port before ordering; an Amazon listing match does not confirm vehicle fitment.
| Engine | Years | Zerostart kit | Cord | Kat's heater | Install location |
|---|---|---|---|---|---|
| 6L 8-cyl | 2011–2019 | 3100109Engine-family lead — confirm exact engine code and model year.(28 MM bore) | 3600082 | 11484Catalog candidate — confirm exact engine code and model year.400 W+ cord 28510 | —(N/A THD N/A position) |
| 6.6L 8-cyl diesel | 2011–2016 | No aftermarket listing — use the genuine Chevrolet dealer kit | |||
| 6.6L 8-cyl diesel | 2017–2026 | 3100152Engine-family lead — confirm exact engine code and model year.400 W(33 mm thread bore) | 3600152 | — | 2ND RF |
| 6.6L 8-cyl | 2020–2026 | No aftermarket listing — use the genuine Chevrolet dealer kit | |||
Reading the numbers: Zerostart 31/35- is the heater kit, 36- the detachable cordset ("lit" glows when the outlet is live). Kat's 11xxx is an element, 28xxx a cordset, 24xxx a pad. Location codes are the manufacturer's (LF = left front of block).
Find the heater or replacement cord
Match the exact part, engine and connector before buying. Search links are discovery links, not confirmed fits.
Amazon buying options
Zerostart 3100109
Catalog starting point: confirm exact engine code, year and installation with the manufacturer.
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Amazon buying options
Zerostart 3600082
Manufacturer catalog cord chart identifies thermostatic GM connector J cord. Confirm connector and application; not a heater element.
Cord / harness only — no heating element.
Choose your Amazon store
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Amazon buying options
Kat's 11484 engine block heater
Catalog starting point: confirm exact engine code, year and installation with the manufacturer.
Choose your Amazon store
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Part reference
Zerostart 3100152
Catalog starting point: confirm exact engine code, year and installation with the manufacturer.
No exact purchase listing verified yet. These links search Amazon; confirm the part before buying.
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Part reference
Zerostart 3600152
Legacy fitment associations are not independently verified vehicle-specific purchase recommendations.
Cord / harness only — no heating element.
No exact purchase listing verified yet. These links search Amazon; confirm the part before buying.
Affiliate links. As an Amazon Associate, we earn from qualifying purchases.
What it costs to plug in a Chevrolet Silverado 2500/3500 HD — and what it saves
The catalogued element for the Silverado 2500/3500 HD draws 400 W. Natural Resources Canada recommends a timer that runs the heater two hours before you drive rather than all night — that is what the numbers below assume.
| Province | ¢/kWh | Cost per 2 h plug-in | Full winter (120 nights) | Net per day |
|---|---|---|---|---|
| Quebec | 7.0 | $0.06 | $6.72 | +$0.44 |
| Manitoba | 10.2 | $0.08 | $9.79 | +$0.41 |
| Ontario (avg TOU) | 12.8 | $0.10 | $12.29 | +$0.39 |
| Alberta | 14.0 | $0.11 | $13.44 | +$0.38 |
| Saskatchewan | 15.5 | $0.12 | $14.88 | +$0.37 |
| Nova Scotia | 17.9 | $0.14 | $17.18 | +$0.35 |
Natural Resources Canada rates the Chevrolet Silverado 2500/3500 HD at 15.9 L/100 km in city driving (median across 2007–2026 model years). On a 20 km winter commute that is about 3.2 L a day. NRCan measured that at −20 °C a block heater improves overall fuel economy by as much as 10% — roughly 0.32 L, or $0.49 of gasoline at $1.55/L. On a single short trip at −25 °C the saving can reach 25%. In most provinces the electricity costs less than the fuel it saves; in the priciest it roughly breaks even, and you still get the wear, defrost and cabin-heat benefits.
Fuel figures: Natural Resources Canada Fuel Consumption Ratings and Block Heaters Save Fuel and Help the Environment. Electricity rates are approximate 2026 residential averages — run your own numbers in the cost calculator.
No tools? The stick-on option
If you'd rather skip the install entirely, a magnetic heater grips any flat steel surface — oil pan, block, transmission pan — and moves between vehicles. Check that the Silverado 2500/3500 HD's oil pan is steel first: a magnet won't hold on aluminum or composite pans.
Amazon buying options
Zerostart 3400017 magnetic heater, 200 W
A magnetic surface heater from Zerostart. Grips any flat steel surface — oil pan, transmission pan, small-engine sump. CSA certified.
Match the surface material, size and manufacturer limits. This is not vehicle-specific fitment.
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Part reference
Digital multimeter with resistance and continuity
The definitive block-heater test tool. Any meter with an ohms range and audible continuity can isolate a dead cord from a failed element.
Confirm the exact specification and application in the listing before ordering.
No exact purchase listing verified yet. These links search Amazon; confirm the part before buying.
Affiliate links. As an Amazon Associate, we earn from qualifying purchases.
First: check whether you already have one
Canadian-market vehicles are often fitted at the port or dealer and then forgotten by the next owner, so check the cord location above before you buy anything. If a cord is there, test it — a dead element and a dead cord look identical from the outside.
If you need one installed
Budget $120–$400 CAD for the part plus about an hour of labour, and book in October — Prairie shop calendars fill after the first cold snap.
FAQ
Does the Chevrolet Silverado 2500/3500 HD come with a block heater?
Factory option or dealer accessory in Canada, depending on year and trim. Check behind the grille for a coiled cord before buying anything — many Canadian-market vehicles have a heater installed that the owner never knew about.
What block heater fits a Chevrolet Silverado 2500/3500 HD?
The recommended setup is a circulating (pump) coolant heater (typically 750–1,000 W). Catalog candidates for the Chevrolet Silverado 2500/3500 HD are grouped by engine below. Check the source review for the exact application before choosing a heater or cord; shared engine size alone does not confirm fitment.
What is the block heater part number for a Chevrolet Silverado 2500/3500 HD?
6L 8-cyl: Zerostart kit 3100109 with cord 3600082 (Kat's 11484); 6.6L 8-cyl diesel: Zerostart kit 3100152 with cord 3600152. Confirm displacement and model year against the fitment table before ordering.
Where is the block heater cord on a Chevrolet Silverado 2500/3500 HD?
Most installs route the cord to the front grille or bumper area, driver's side. Check for an existing coiled cord before buying anything.
How much does it cost to plug in a Chevrolet Silverado 2500/3500 HD?
At 400 W on a two-hour timer the heater uses about 0.80 kWh a night — roughly 10¢ in Ontario, 11¢ in Alberta and 6¢ in Quebec. Over a 120-night winter that is about $13.44 at Alberta rates.
Does a block heater save fuel on a Chevrolet Silverado 2500/3500 HD?
Yes. Natural Resources Canada rates the Silverado 2500/3500 HD at 15.9 L/100 km in city driving, and found that at −20 °C a block heater improves overall fuel economy by as much as 10% — about 0.32 L on a 20 km winter commute. On a single short trip at −25 °C the saving can reach 25%. In most provinces that is worth more than the electricity it costs.
Should you plug in tonight?
Enter your city — we check tonight's forecast and give you a straight answer based on the temperature thresholds that matter.
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