diff --git a/opendbc/car/gm/fingerprints.py b/opendbc/car/gm/fingerprints.py
index 89bde82006..f443d082bb 100644
--- a/opendbc/car/gm/fingerprints.py
+++ b/opendbc/car/gm/fingerprints.py
@@ -1,7 +1,6 @@
 # ruff: noqa: E501
 from opendbc.car.gm.values import CAR
 
-# Trailblazer also matches as a SILVERADO, TODO: split with fw versions
 # FIXME: There are Equinox users with different message lengths, specifically 304 and 320
 
 
@@ -48,9 +47,6 @@
   CAR.CHEVROLET_BOLT_EUV: [{
     189: 7, 190: 7, 193: 8, 197: 8, 201: 8, 209: 7, 211: 3, 241: 6, 257: 8, 288: 5, 289: 8, 298: 8, 304: 3, 309: 8, 311: 8, 313: 8, 320: 4, 322: 7, 328: 1, 352: 5, 381: 8, 384: 4, 386: 8, 388: 8, 451: 8, 452: 8, 453: 6, 458: 5, 463: 3, 479: 3, 481: 7, 485: 8, 489: 8, 497: 8, 500: 6, 501: 8, 528: 5, 532: 6, 560: 8, 562: 8, 563: 5, 565: 5, 566: 8, 587: 8, 608: 8, 609: 6, 610: 6, 611: 6, 612: 8, 613: 8, 707: 8, 715: 8, 717: 5, 753: 5, 761: 7, 789: 5, 800: 6, 810: 8, 840: 5, 842: 5, 844: 8, 848: 4, 869: 4, 880: 6, 977: 8, 1001: 8, 1017: 8, 1020: 8, 1217: 8, 1221: 5, 1233: 8, 1249: 8, 1265: 8, 1280: 4, 1296: 4, 1300: 8, 1611: 8, 1930: 7
   }],
-  CAR.CHEVROLET_SILVERADO: [{
-    190: 6, 193: 8, 197: 8, 201: 8, 208: 8, 209: 7, 211: 2, 241: 6, 249: 8, 257: 8, 288: 5, 289: 8, 298: 8, 304: 3, 309: 8, 311: 8, 313: 8, 320: 4, 322: 7, 328: 1, 352: 5, 381: 8, 384: 4, 386: 8, 388: 8, 413: 8, 451: 8, 452: 8, 453: 6, 455: 7, 460: 5, 463: 3, 479: 3, 481: 7, 485: 8, 489: 8, 497: 8, 500: 6, 501: 8, 528: 5, 532: 6, 534: 2, 560: 8, 562: 8, 563: 5, 565: 5, 587: 8, 608: 8, 609: 6, 610: 6, 611: 6, 612: 8, 613: 8, 707: 8, 715: 8, 717: 5, 761: 7, 789: 5, 800: 6, 801: 8, 810: 8, 840: 5, 842: 5, 844: 8, 848: 4, 869: 4, 880: 6, 977: 8, 1001: 8, 1011: 6, 1017: 8, 1020: 8, 1033: 7, 1034: 7, 1217: 8, 1221: 5, 1233: 8, 1249: 8, 1259: 8, 1261: 7, 1263: 4, 1265: 8, 1267: 1, 1271: 8, 1280: 4, 1296: 4, 1300: 8, 1611: 8, 1930: 7
-  }],
   CAR.CHEVROLET_EQUINOX: [{
     190: 6, 193: 8, 197: 8, 201: 8, 209: 7, 211: 2, 241: 6, 249: 8, 257: 8, 288: 5, 289: 8, 298: 8, 304: 1, 309: 8, 311: 8, 313: 8, 320: 3, 328: 1, 352: 5, 381: 8, 384: 4, 386: 8, 388: 8, 413: 8, 451: 8, 452: 8, 453: 6, 455: 7, 463: 3, 479: 3, 481: 7, 485: 8, 489: 8, 497: 8, 500: 6, 501: 8, 510: 8, 528: 5, 532: 6, 560: 8, 562: 8, 563: 5, 565: 5, 587: 8, 608: 8, 609: 6, 610: 6, 611: 6, 612: 8, 613: 8, 707: 8, 715: 8, 717: 5, 753: 5, 761: 7, 789: 5, 800: 6, 810: 8, 840: 5, 842: 5, 844: 8, 869: 4, 880: 6, 977: 8, 1001: 8, 1011: 6, 1017: 8, 1020: 8, 1033: 7, 1034: 7, 1217: 8, 1221: 5, 1233: 8, 1249: 8, 1259: 8, 1261: 7, 1263: 4, 1265: 8, 1267: 1, 1271: 8, 1280: 4, 1296: 4, 1300: 8, 1611: 8, 1930: 7
   },
diff --git a/opendbc/car/gm/values.py b/opendbc/car/gm/values.py
index 4d58a27125..061aae8269 100644
--- a/opendbc/car/gm/values.py
+++ b/opendbc/car/gm/values.py
@@ -85,6 +85,8 @@ class GMPlatformConfig(PlatformConfig):
     Bus.radar: 'gm_global_a_object',
     Bus.chassis: 'gm_global_a_chassis',
   })
+  wmis: set[str] = field(default_factory=set)
+  years: set[str] = field(default_factory=set)
 
 
 @dataclass
@@ -154,6 +156,8 @@ class CAR(Platforms):
       GMCarDocs("GMC Sierra 1500 2020-21", "Driver Alert Package II", video_link="https://youtu.be/5HbNoBLzRwE"),
     ],
     GMCarSpecs(mass=2450, wheelbase=3.75, steerRatio=16.3, tireStiffnessFactor=1.0),
+    wmis={"3GC", "3GT", "1GC", "1GT"},
+    years={"L", "M"},
   )
   CHEVROLET_EQUINOX = GMPlatformConfig(
     [GMCarDocs("Chevrolet Equinox 2019-22")],
@@ -162,6 +166,8 @@ class CAR(Platforms):
   CHEVROLET_TRAILBLAZER = GMPlatformConfig(
     [GMCarDocs("Chevrolet Trailblazer 2021-22")],
     GMCarSpecs(mass=1345, wheelbase=2.64, steerRatio=16.8, centerToFrontRatio=0.4, tireStiffnessFactor=1.0),
+    wmis={"KL7"},
+    years={"M", "N"},
   )
   CADILLAC_XT4 = GMSDGMPlatformConfig(
     [GMCarDocs("Cadillac XT4 2023", "Driver Assist Package")],
@@ -180,6 +186,16 @@ class CAR(Platforms):
     GMCarSpecs(mass=2490, wheelbase=2.94, steerRatio=17.3, centerToFrontRatio=0.5, tireStiffnessFactor=1.0),
   )
 
+def match_fw_to_car_fuzzy(live_fw_versions, vin, offline_fw_versions) -> set[str]:
+  candidates = set()
+# Check the WMI and chassis code to determine the platform
+  wmi = vin[:3]
+  year = vin[9:10]
+  for platform in CAR:
+    if wmi in platform.config.wmis and year in platform.config.years:
+      candidates.add(platform)
+  return {str(c) for c in candidates}
+
 
 class CruiseButtons:
   INIT = 0
@@ -251,6 +267,7 @@ class CanBus:
     ),
   ]],
   extra_ecus=[(Ecu.fwdCamera, 0x24b, None)],
+  match_fw_to_car_fuzzy=match_fw_to_car_fuzzy,
 )
 
 # TODO: detect most of these sets live