What owners actually paid for this repair, computed from real, paid GMC Sierra 2500HD glow plug replacements at independent shops across the US.
$415
typical total — half of all GMC Sierra 2500HD glow plug replacement jobs cost less, half cost more
Fair range $237 – $660
the middle half of all invoices (parts + labor + fees)
$2371 in 4 paid less
$415typical
$6603 in 4 paid less
Line item
Low (1 in 4 paid less)
Typical
High (3 in 4 paid less)
Parts — Glow plugsGlow plugs (usually a set or a bank); sometimes the control module
$39
$77
$202
Labor — 2.5 hrs typicalRange 1.6 – 3.4 hrs: test each plug, replace, verify cold-start operation
$157
$249
$437
Shop fees, supplies & taxThe remainder of a typical invoice after parts and labor; varies by state and shop
—
~$88
—
Total — what owners paid
$237
$415
$660
Low / typical / high are computed per line, so they don't add up exactly to the totals — the total row is the real distribution of complete invoices.
Is your quote fair?
A quote between $237 and $660 is inside the band where half of all GMC Sierra 2500HD glow plug replacements landed. Below it is not automatically a bargain (one or two plugs on an accessible bank); above it is not automatically gouging (a full set on both banks, a seized plug extracted, control module replaced) — but both ends deserve a question.
What moves the price
How many — shops usually replace a full set or bank so they age together.
Seized plugs — a plug that breaks in the head turns a routine job into machine work.
Module — a glow plug circuit code can be the controller, not the plugs.
About this data · How to use this report
Vehicle GMC Sierra 2500HD, model years 2001–2021 Data confidence Good— good sample, dependable ranges Records through July 2026, refreshed continuously Source paid invoices from independent US repair shops
Bring it to the shop. Ask for the written estimate split into parts, labor hours and rate, and fees — then compare each line. A shop that explains a number above the range is doing its job; one that won't is telling you something too.