Pre-Purchase Inspection

Comprehensive pre-purchase inspection of a 2014-2018 Chevrolet Silverado 1500 with 5.3L V8 EcoTec3 engine to assess mechanical condition, identify existing or potential issues, and verify proper operation of all major systems.

Warnings

Tools required

Preparation

1. Ensure vehicle is on level ground in a well-lit area with adequate ventilation
2. Verify vehicle has been driven and is at normal operating temperature for fluid and leak inspection
3. Allow engine to cool for at least 30 minutes before beginning underhood inspection
4. Prepare inspection checklist or documentation method for recording findings
5. Gather all necessary tools and testing equipment before beginning

Procedure

1. 1

   Scan for diagnostic trouble codes
   Connect OBD-II scanner to diagnostic port located under driver side dashboard. Record all stored and pending diagnostic trouble codes (DTCs). Check for emissions readiness monitors - all monitors should show 'ready' status unless vehicle was recently serviced. Pay special attention to codes related to AFM lifters (P0300-P0308), evaporative emissions, oxygen sensors, and transmission. Do not clear codes - document them for buyer awareness.
2. 2

   Inspect exterior body condition and paint
   Walk around vehicle and document all body damage, dents, scratches, rust, or paint inconsistencies. Check for evidence of accident repair including misaligned panels, overspray, or paint color mismatch. Inspect all door seals and weatherstripping for damage. Open and close all doors, hood, and tailgate to verify proper alignment and latch operation. Check bed for rust, especially in corners and near drain holes. Inspect frame and body mounts visible from exterior for rust or damage.
3. 3

   Inspect tires and measure tread depth
   Check all four tires (plus spare if equipped) for tread depth using gauge - minimum legal limit is 2/32 inch but recommend replacement at 4/32 inch. Verify all tires are same size and type. Look for uneven wear patterns indicating alignment issues, cupping from worn suspension, or feathering from improper toe settings. Check sidewalls for cracks, bulges, or damage. Verify tire age from DOT code - tires over 6 years old should be replaced regardless of tread depth. Record tire pressures and compare to door jamb specification (typically 35 psi front and rear).
4. 4

   Raise vehicle and secure on jack stands
   Position hydraulic jack under front crossmember near lower control arm mounts and raise front of vehicle. Place jack stands under frame rails behind lower control arms. Lower vehicle onto stands. Repeat process for rear of vehicle, jacking at rear axle center and placing stands under frame rails forward of rear axle. Ensure vehicle is stable before working underneath. Remove all four wheels and set aside for brake inspection.
5. 5

   Inspect brake system components
   At each wheel, measure brake pad thickness on all four calipers - front pads should be minimum 3mm, rear minimum 2mm. Inspect rotors for scoring, warping, or excessive rust. Check brake hoses for cracks, bulging, or fluid seepage. Inspect caliper slide pins for binding and proper lubrication. Examine brake lines running along frame for rust, damage, or previous repairs. Under hood, check brake fluid level and condition - fluid should be clear to light amber, not dark brown. Use test strips to verify moisture content if available.
6. 6

   Inspect suspension and steering components
   Inspect front lower control arm bushings for cracking or separation - common wear point on these trucks. Check upper control arm ball joints for excessive play by attempting to move wheel hub vertically. Inspect tie rod ends and center link for wear. Examine shock absorbers for leaks or damage. Check sway bar end links and bushings. Inspect steering rack boots for tears and rack for leaks. In rear, inspect leaf spring bushings, shackles, and U-bolts for wear or damage. Check rear shock absorbers for leaks.
7. 7

   Inspect driveline and differential
   Inspect rear differential for oil seepage from pinion seal or cover gasket. Check differential cover for damage from road debris. Rotate driveshaft by hand and feel for roughness or binding in U-joints - replace if any play detected. Inspect CV or slip yoke at transmission for leaks. Check driveshaft center support bearing (if equipped with two-piece driveshaft) for wear. Examine exhaust system hangers, catalytic converters, and muffler for damage, excessive rust, or modifications.
8. 8

   Inspect frame and underbody for rust and damage
   Thoroughly inspect entire frame for rust, especially at rear spring hangers, crossmembers, and body mount locations. Check for evidence of frame damage or previous collision repair. Inspect all fuel and brake lines along frame for corrosion. Examine transfer case (if 4WD) for leaks or damage. Check transmission pan for leaks and damage. Inspect engine oil pan and drain plug for leaks or stripped threads. Look for evidence of fluid leaks on ground or components - trace any leaks to source.
9. 9

   Reinstall wheels and lower vehicle
   Install all four wheels and hand-thread lug nuts. Raise vehicle slightly to remove jack stands, then lower completely to ground. Torque all lug nuts to specification in star pattern - do not use impact wrench for final torque. Verify wheels are properly secured before proceeding.
10. 10

    Inspect engine compartment and fluid levels
    Open hood and inspect engine bay for cleanliness - excessive degreasing may hide leaks. Check engine oil level and condition on dipstick - oil should be amber to light brown, not black or containing metal particles. Verify coolant level in overflow tank and check color (should be orange DEX-COOL). Inspect all visible hoses for cracks, bulging, or soft spots. Check drive belt for cracks or glazing. Inspect air filter condition. Check transmission fluid level using dipstick if equipped (some models do not have dipstick). Examine valve covers, oil pan, and timing cover for oil leaks. Inspect intake manifold and throttle body area for oil accumulation indicating PCV issues.
    ⚠L83 engines with AFM can consume oil between changes. Low oil level may indicate consumption issue or neglected maintenance.
11. 11

    Inspect engine for AFM lifter issues
    Start engine and listen carefully for abnormal noises. AFM lifter failure presents as ticking or tapping noise, often worse on cold start. Listen at valve covers with mechanics stethoscope or long screwdriver if available. Check for excessive valve train noise that persists after warm-up. Rev engine slightly and listen for rattling from timing chain area - stretched timing chains are common on high-mileage examples. Note any rough idle or misfires. Allow engine to reach operating temperature and verify cooling fans cycle properly.
    ⚠AFM lifter failure can cause catastrophic engine damage if not addressed. Any ticking or tapping noise should be investigated further with compression or leak-down test.
12. 12

    Test transmission operation
    With engine at operating temperature, test transmission through all gears in both Drive and Manual mode if equipped. Verify smooth shifts with no slipping, harsh engagement, or delayed shifts. The 6-speed automatic (6L80) should shift smoothly without flare or hunting. Check for shudder during light acceleration between 25-45 mph which may indicate torque converter issues. In Park, verify parking pawl holds vehicle on incline. Listen for whining noises from transmission that could indicate pump or bearing issues.
13. 13

    Inspect interior condition and accessories
    Test all power windows, locks, and mirrors for proper operation. Verify air conditioning blows cold and heating system works properly. Check all interior lights, radio, navigation if equipped. Test backup camera and parking sensors if equipped. Inspect seats for wear, damage, or staining. Check headliner for sagging or water stains indicating leaks. Verify all gauges function properly. Test windshield wipers and washer system. Inspect carpets and floor mats for water intrusion. Check pedal assemblies for excessive wear.
14. 14

    Perform road test evaluation
    Test drive vehicle on variety of road conditions. Verify engine accelerates smoothly without hesitation or misfires. Test transmission shifts smoothly under various throttle inputs. Check brakes for straight stops without pulling - pedal should be firm with no pulsation. Verify steering returns to center and has no excessive play or vibration. Listen for suspension noises over bumps. Test 4WD system engagement if equipped - should engage smoothly without grinding. Verify cruise control operates properly. Check for any vibrations at highway speed indicating balance or driveline issues.
15. 15

    Document all findings and prepare inspection report
    Compile all inspection findings into organized report. Document all DTCs found, fluid conditions, tire measurements, brake pad thicknesses, and any mechanical issues discovered. Note all deferred maintenance items. Photograph any areas of concern for documentation. Provide estimate of immediate repairs needed and upcoming maintenance based on mileage. Include severity rating for each issue found (critical, important, or minor). Recommend specialized inspection if AFM lifter noise detected or major concerns found.

Reassembly

1. No disassembly required for this inspection procedure

Verification

• Review all inspection checklist items to ensure nothing was missed
• Verify all wheels were properly torqued after reinstallation
• Confirm all OBD-II codes were documented before disconnecting scanner
• Ensure hood is properly closed and all tools are removed from engine compartment
• Verify vehicle is in same or better condition than when inspection started
• Provide complete written report with all findings, recommendations, and photographs

More procedures for this vehicle